Question

define desertification. don't tell from google otherwise I will delete that answer​

Answer 1

A process from which fertiled land becomes desert from a typical type of drought.

If helps then mark as the branliest

Answer 2

Answer:

A converging lens is said to have positive focal length. A converging lens causes exiting rays to be more convergent coming out than they were entering the lens. A diverging lens is said to have negative focal length.