HELP ITS A TIMED TEST PL Which statement BEST explains how energy flows through an ecosystem?

A. Flows through an ecosystem in multiple directions from various heterotrophs to
autotrophs.

B. Flows through an ecosystem in one direction, from the sun or inorganic compounds to
autotrophs and then to various heterotrophs.

C. Cycles through an ecosystem in multiple directions from various heterotrops to
autotrophs.

D. Cycles through an ecosystem in one direction, from the sun or inorganic compounds
to autotrophs and then to various heterotrophs.