They'd observe any new substances or new color, and temp. that is irreversible.
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Answer: i think your answer is<u> The giant green anemones, the ochre sea stars, and the red octopuses</u> because an ecosystem means all the organisms and the physical environment with which they interact. If not then your other option would be <u>A a school of fluffy sculpins.</u>
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A. Reactants, products
In a chemical reaction, reactants interact to form products