Organisms need energy to conduct essential life activities. Basically, energy is essential to every organisms because it is their source of power to get food and to reproduce. Without it, organisms would not function properly and will soon die.
Answer:
Consumer: a person or thing that eats or uses something.
Producer: an organism that produces. (makes) its own food.
Explanation:
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B. They decrease. As more we use the sources of nature, the less is left.
