Answer:
eating other organisms.
Breaking down animal remains and wastes .
The Sun.
Step-by-step explanation:
Consumers must obtain their nutrients and energy by eating other organisms. Decomposers break down animal remains and wastes to get energy. Decomposers are essential for the stability and survival of an ecosystem.
The Sun is the major source of energy for organisms and the ecosystems of which they are apart. Producers such as plants, algae, and cyanobacteria use the energy from sunlight to make organic matter from carbon dioxide and water.
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