The correct options are:
- Improved engines; engines were improved significantly so that they can have the same power and agility but by using less fuel.
- Cleaner burning fuels; it has been invested a lot of time and money into improving the fuels and making them as effective as possible but also removing or lowering the most dangerous components towards the environment.
- Catalytic converters; this devices for exhaust emission control manage to convert the toxic gasses and polutants into less toxic pollutants by managing to catalyze a redox reaction.
Answer:
Class 8
What are natural resources?
How does land fulfil our needs?
Name a few landforms.
What are the factors that determine the pattern in which a particular region is used?
Mention some methods that are used to conserve soil?
Class 7
Name the brightest flower on tall trees.
How is natural vegetation classified?
Why do type and thickness of natural vegetation vary from place to place?
Write down the features of Tropical Evergreen Forests.
Write the features of Tropical Deciduous Forests.
Where are Temperate Evergreen forests located?
Which region is called the “orchards of the world” and why?
Write major features of Mediterranean Vegetation.
Explain major features of Tundra Type of Vegetation
I think it's probably position
Answer:
little rainfall
Mesopotamians depended on the annual flooding of Tigris and Euphrates rivers
this was similar to the Egyptians
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Caucasus
more like 4 countries with the civel war but ok