Which of the Following Components is Not Recycled Within an Ecosystem

Question

Which of the following components is not recycled within an ecosystem?
A) heat
B) nitrogen
C) phosphorus
D) carbon

Accepted Answer

Heat is not recycled in an ecosystem; it is lost to the environment, primarily as a result of energy transformations, following the second law of thermodynamics. Nitrogen, phosphorus, and carbon are all recycled through various biogeochemical cycles.