Question

topsoil erodes
fewer plant roots to anchor soil
soil quality deteriorates
plants die
what type of feedback loop is involved in soil erosion?
incomplete loop
a positive feedback loop
negative feedback loop

Explanation:

In a positive feedback loop, a change in a system leads to further changes in the same direction, amplifying the initial effect. In soil erosion, top - soil erosion causes soil quality to deteriorate, which makes plants die. Fewer plants mean fewer roots to anchor the soil, leading to more top - soil erosion, thus amplifying the problem. In a negative feedback loop, the system would self - regulate to counteract the change. There is no such thing as an incomplete loop in this context.

Answer:

B. a positive feedback loop