They decrease because the zebra mussel were taking their resources. Leaving them nothing to eat.
Answer:
combustible ....................
Answer:
<em>Goose Flesh</em><em> also known as </em><em>Goose Bumps</em><em> also known as</em><em> Cutis Anserina (scientific term).</em><em> It is a temporary change of skin. The skin becomes rougher due to fear, cold, excitement, etc. Small bumps appear on the surface of the skin because the arrector pili muscles contract. </em>
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Answer: make systematic observations and carefully collect relevant evidence.Then they use logical reasoning and some imagination to develop hypotheses and explanations.
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Explanation: