Geography and environmental studies

Drainage of ethiopia

In which layer of atmosphere Ozone (O3) is mostly found ?

what are the major areas that geography concerns?

what does it mean by "geological time scale ?" in geography

what forces that chage the surface of the earth?

the materials that comes surface as a result of volcanic eruption is -----------

What does it mean by solar eclipse?
_______________________
____________[____________
As seen from the earth,a solar eclipse occurs when the moon passes between the sun and the earth and the moon fully or partially blocks the sun.

How many layer is there on earth?
A/2 B/3 C/4 D/5