Question

photoautotrophs provide ______ of the energy supply for life on earth.
a 22%
b 87%
c 99%
d 56%

Explanation:

Photoautotrophs, like plants and some bacteria, use photosynthesis to convert light - energy into chemical energy. They form the base of most food - webs and are the primary producers for the vast majority of ecosystems on Earth, supplying about 99% of the energy for life on Earth.

Answer:

c. 99%