Question

The primary source of energy in most ecosystems is/are
heterotrophs.
glucose.
autotrophs
the sun

Answer 1

The primary source of energy in most ecosystems is **the sun**. Sunlight is harnessed by autotrophs (such as plants, algae, and some bacteria) through the process of photosynthesis, converting solar energy into chemical energy stored in glucose. Heterotrophs then obtain energy by consuming autotrophs or other heterotrophs.