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 main energy - source for most ecosystems through photosynthesis. Some ecosystems, like deep - sea hydrothermal vent ecosystems, get energy from chemical compounds through chemosynthesis. Organisms in the ecosystem use energy rather than being a source of energy input, and water is not an energy source for ecosystems.

Answer:

A. sunlight, B. chemical compounds