Question

which of the following represent sources of energy input to an ecosystem?
select all that apply
a sunlight
b chemical compounds
c organisms in the ecosystem
d water

Explanation:

• Sunlight is the primary energy source for most ecosystems, captured by photosynthetic organisms.
• Chemical compounds (like hydrogen sulfide) are energy sources for chemosynthetic ecosystems (e.g., deep-sea vents).
• Organisms in the ecosystem are energy consumers/transmitters, not input sources.
• Water is a necessary resource but not an energy input.

Answer:

a. sunlight
b. chemical compounds