All of the Following Are True About Ecosystems Except

Multiple Choice

All of the following are true about ecosystems except

A) they contain both living and nonliving components.
B) there is a transfer of energy through the system and it is lost.
C) there is a cycling of nutrients through the system again and again.
D) the ultimate source of energy is the sun for nearly all known ecosystems.
E) they represent the lowest level of biological organization that is known.