How is desertification affecting the sahel? a. it causes the land easier to farmb. it causes the land to become more aridc. it causes the formation of lakes and pondsd. it causes more people to move to the area.

D, THat is the answer

hi there!

question - how does mountainous terrain affect settlements in a region? choose all answers that are correct.

groups trade with each other regularly.

people travel from settlement to settlement.

why: since they travel to go trade or visit it may be harder to get there because of the mountainous terrain.

hope this : )

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