Question 90

(Multiple Choice)

The following questions refer to the description below.
Soil can be considered a complex ecosystem because it contains inorganic particles,minerals,water,and a large diversity of living organisms that all interact with one another.Plants need soil to grow and humans depend on plants for food,building supplies,a source of heat,etc.
-There are many ways that soils can be protected; which of the following is not one of them?


A)Leaving vegetation, such as tree cover and standing crops, to protect soil from erosion.
B)Not removing leaf litter and other organic material from soil.
C)Clear cutting, but in a few years replanting new seedlings.
D)Avoiding use of chemicals that may harm soil organisms.
E)Earthworms are important for soil aeration and addition of nutrients.

Answer