A Desert Environment Has a Very Low NPP

Multiple Choice

A desert environment has a very low NPP.What does this suggest about the number of trophic levels in its food webs?

A) The only predators will be small, such as scorpions.
B) The webs will have plants and primary consumers only.
C) All food chains in the web will have at least three secondary consumers.
D) Most food chains will have few trophic levels, usually only three.
E) Most food chains will have at least four or five trophic levels.