Q: Fact 1: Most plants grow roots down into the soil to absorb water and minerals. Fact 2: Plant roots begin to stabilize the soil against erosion. Given the two facts above, what is a positive effect of plant needs for water and minerals from soil?

Pick from:
a). erosion prevention.
b). reducing acid rain.
c). It helps them survive.
d). agriculture.
e). nutrient deficiency.
f). water run-off.
g). erosion.
h). Exfoliation.
A:
a).