Organisms that cannot use sunlight directly obtain energy by consuming plants or other——————
that have consumed plants

Organisms

Explanation:

Organisms that cannot use sunlight directly obtain energy by consuming plant or other organisms that have consumed plants.

These organism are heterotrophs.

Plants are autotrophs as they produce their own food on their own. They are the primary producers in the ecosystem by means of photosynthesis. Heterotrophs relies on the food produced by autotrophs. They can obtain this by either feeding on plant matter or by feeding on primary consumers that feeds on plants.