D. It's harder body parts. A lot of fossils are of the skull, therefore that would lead one to think that it would be harder<span />
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Biotic-the decrease of fish can Make the bear population decrease
abiotic-A rapid change in the temperature can make the bear population decline
Environmental engineering is the branch of engineering that is concerned with protecting people from the effects of adverse environmental effects, such as pollution, as well as improving environmental quality
