Question

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

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 provide about 99% of the energy supply for life on Earth.

Answer:

A. 99%