Answer:
I think it will option b hope it helps
Answer: Energy is passed up a food chain or web from lower to higher trophic levels. This loss of energy explains why there are rarely more than four trophic levels in a food chain or web. Sometimes there may be a fifth trophic level, but usually there's not enough energy left to support any additional levels.
Explanation: :) Hope it helps
The answer is A: They produce pollutants that harm people.
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Answer:
Explanation:
Basic building blocks of all living things
