Question

where does the energy for over 99% of the living things on earth come from?
plants
the sun
thermal vents

Explanation:

In the ecosystem, most living things rely on the sun's energy. Plants use photosynthesis to convert solar energy into chemical energy, and other organisms get energy by consuming plants or other organisms that ultimately depend on the sun. Thermal vents are a source for some deep - sea organisms, but they are a minority. Plants are producers that use solar energy, so the primary source for over 99% of living things is the sun.

Answer:

The sun