Question

which factors are responsible for variation in vegetation on the earth​

Answer 1

Explanation:

Local hydrology conditions are found to directly influence vegetation variations. Vegetation degradation increases with distance from surface water boundaries up to 4 km, but groundwater might serve as a reliable source for preventing vegetation from degrading

Answer 2

Answer:

environment condition is the cause because every animals and plants change him acc. to surrounding condition and environmental conditions .

I hope this help you a lot