They provide a good balance between the size and shape of land areas.
Volcanic eruptions are formed when so much PRESSURE from the magma inside the volcano builds up to it's boiling point.
An example would be like shaking soda as soon as the pressure is released there is foam. It's then same concept but with magma aka lava
Hope this helped
features such as mountains (higher elevation = colder temperatures), ocean (winds blowing to land), valleys (could create a rain shadow, making it very rainy), etc.
Answer:
The land must produce enough food to feed an enormous population.
