Which Statement Best Describes a Typical Food Chain

Multiple Choice

Which statement best describes a typical food chain?

A) An owl has a positive impact on the grass population.
B) An owl has a negative impact on the grass population.
C) A carnivore has a negative effect on primary producers.
D) Energy can flow back and forth between trophic levels.
E) Energy is never lost as it moves from one trophic level to the next.