Which Statement Most Accurately Describes How Matter and Energy Are

Multiple Choice

Which statement most accurately describes how matter and energy are used in ecosystems?

A) Matter flows through ecosystems;energy cycles within a single ecosystem.
B) Energy flows through ecosystems;matter cycles within and through ecosystems.
C) Energy can be converted into matter;matter cannot be converted into energy.
D) Matter can be converted into energy;energy cannot be converted into matter.
E) Matter is used in every ecosystem;energy is only used in some ecosystems.