Question

which two actions help keep the soil that covers landfills from being worn away?
a the roots of plants keep the soil from eroding.
b people pay a fee based on the weight of the trash.
c waste breaks down into harmful gases.
d nets cover the area to keep people away.
e pipes move rainwater away from soil layers.

Explanation:

To determine which actions prevent soil erosion on landfill covers, we analyze each option:

• Option A: Plant roots stabilize soil, reducing erosion. This is a valid method for soil conservation.
• Option B: Trash - weight - based fees relate to waste management costs, not soil erosion prevention. Eliminate B.
• Option C: Waste breaking into harmful gases is about waste decomposition, not soil erosion. Eliminate C.
• Option D: Nets to keep people away do not directly prevent soil erosion. Eliminate D.
• Option E: Pipes moving rainwater away from soil layers reduce water - induced erosion (like runoff - related erosion). This is a valid method.

Answer:

A. The roots of plants keep the soil from eroding.
E. Pipes move rainwater away from soil layers.