The correct answer to this open question is the following.
Although there are no options attached we can say the following.
What happened when protesters in Syria stood up against the president was that the army repelled the protest with violent aggressions.
Sad but true. The government of Syria turned what first were pacific protests into a civil war that has severely damage the country and is the reason why thousands of people had decided to immigrate, creating an international migration crisis in the Middle East.
The original idea of the Syrian people was to peacefully take the streets to protest for better living conditions and democracy, as part of the events during the so-called "Arab Spring" of 2011. However, President Bashar al-Assad ordered to aggressively repel the protest, and since that day, the thing became horrible in places such as Aleppo, and many more.
Muslim countries such as Tunisia, Egypt, Syria, Morocco, and Libya took the streets in the Spring of 2011 to protest against their governments, demanding political changes that allowed people more freedom and better living opportunities. For instance, the protest in Egypt was so big that they could end with the dictator that governed Egypt for years, Hosni Mubarak.
Unfortunately in Syria, something very different happened.
One of the most striking ongoing changes in the Arctic is the rapid melting of sea ice. Some climate models predict that, sometime during the first half of the 21st century, summer sea ice will vanish from the Arctic Ocean. An absence of summer ice would amplify the existing warming trend in Arctic tundra regions as well as in regions beyond the tundra, because sea ice reflects sunlight much more readily than the open ocean and, thus, has a cooling effect on the atmosphere. In addition, research indicates that the retreat of sea ice would enhance the productivity of tundra vegetation, and the resulting buildup of plant biomass might lead to more extreme events such as large tundra fires. Finally, an ice-free Arctic Ocean would improve access to high northern latitudes for recreational and industrial activities; this would likely place additional stress on tundra plants and animals as well as compromise the resilience of the tundra ecosystem itself. In alpine tundras too, climate warming could encourage more human activity and increase damage to plant and animal populations there.
The fate of permafrost in a warmer world is a particularly important issue. Together, tundra and taiga account for approximately one-third of global carbon storage in soil, and a large portion of this carbon is tied up in permafrost in the form of dead organic matter. Some of this organic matter has been preserved for many thousands of years, not because it is inherently difficult to break down but because the land has remained frozen. Thawing of the permafrost would expose the organic material to microbial decomposition, which would release carbon into the atmosphere in the form of CO2 and methane (CH4). Rates of microbial decomposition are much lower under anaerobic conditions, which release CH4, than under aerobic conditions, which produce CO2; however, CH4 has roughly 25 times the greenhouse warming potential of CO2. The Arctic has been a net sink (or repository) of atmospheric CO2 since the end of the last ice age. At the same time, however, the region has been a net source of atmospheric CH4, primarily because of the abundance of wetlands in the region.
South Africa is your answer
Answer:
There are four layers of the Earth, including Inner Core, Outer Core, mantle, and Crust. Each layer has its characteristics because of its temperature and formation.
The inner core is solid with iron and other metal deposit in it. The outer core is liquid, while the mantle is composed of silicate rocks. The crust is the outer layer of the earth, consist of different types of rocks.
The earth was able to develop a layer structure because of the climatic change it had millions of years ago, where the hardest metal reached to its core.
Answer:
1- methyl bromide
2- decomposing manure
3- synthetic fertilizer
4- combustion of fossil fuels
I think this is it I may be wrong