Which Statement Reflects a Key Concept About Ecosystems

Which statement reflects a key concept about ecosystems?

A) Matter moves linearly through different systems, both abiotic and biotic, within an ecosystem.
B) There is a one-way flow of energy through the food webs of ecosystems.
C) Conservation should focus on the success and survival of individual species.
D) The abiotic environment does not influence the distribution and survival of particular organisms.
E) Heat energy can be used by organisms for their daily activities.