Question

for the most part energy in ecosystems starts in/comes from the sun heterotrophs chemical energy in our bodies plants heat rewatch

Explanation:

In ecosystems, the sun is the primary source of energy. Producers (like plants) use sunlight in photosynthesis to convert it into chemical energy. Heterotrophs rely on consuming other organisms. Chemical energy in our bodies comes from the food we eat (which ultimately traces back to the sun). Heat is a by - product of energy transfer. Plants are producers but their energy starts with the sun.

Answer:

the sun