* HELP PLEASE *

Which of the following items is a cause that can correctly complete this chart?
A)Active volcanoes spew ash and lava over the landscape.
B)Air pollution spreads through the water cycle.
C)Large areas of land are set aside as conservation areas.
D)Forests are cleared for farming and timber.

D) Forests are cleared for farming and timber.

Explanation:

Deforestation is a problem in that as there are no longer trees and obstacles to impede the flow of the water when it floods, the force and amount of water will cause even more damage than it would otherwise.

answer: a.letter a . . letter "correct answer"

b.letter c . . letter b "not b'

c.letter a . . letter b

d.letter b . . letter a

explanation:

heat from the core of the earth causes convection currents to occur in the mantle. these currents slowly move the crust around.