Examine how nearly all energy for life comes directly or indirectoy from the sun, givn that heterotrophs get their energy from the food they eat

Carnivorous eterotrophs that rely on herbivorous heterotrophs for nourishment.

The herbivorous heterotrophs rely on autotrophs, such as plants.

These autotrophs rely on the sun for energy.

Therefore, all life forms rely on the sun's energy for sustenance; their dependence may be direct as in the case of autotrophs or indirect as in the case of heterotrophs.