The correct answer is - cyanobacteria.
The atmospheric oxygen came from the cyanobacteria. These were one of the earliest living organisms on Earth. The cyanobacteria was using photosynthesis in order to create its own food. The photosynthesis process requires sunlight, carbon dioxide, water, and oxygen. The oxygen is mostly released as a waste product from the process of photosynthesis, thus the cyanobacteria were literally releasing oxygen that was ending up into the atmosphere. As more and more cyanobacteria there were across the planet, more and more oxygen they were releasing into the atmosphere, slowly changing the composition of the atmosphere, and setting the basis of it as we know it now.
Answer:
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<u>Answer:</u>
D. Preventing people from visiting wildfire-prone areas
This would cause the greatest reduction of wildfires
<u>Explanation:</u>
Anthropogenic activities are the main source for forest fires. Humans intentionally or unintentionally became the reason for forest fires than lightning, rainfall deficit, and wind speed. Forest people responsible for causing fires because of shifting cultivation and livelihoods. Sub tropical forest were fired for cattle rearing becuase dense forests are not fit for cattle rearing. Increase in lightning storm also causes the forest fire. Decrease in rainfall leads to forest fire in Equator and tropical regions because of high temperature and high wind speed.
One reason is that the plates float on a hot boiling mentle. when the heat rises and the mentle expands the plates above it also moves.
the other reason is that the plates themselves move.plates have warmer inner sides that tend to rise. and colder outer side that tends to sink. this tug of war between the hotter and colder sides of the plate also helps them move.
