Explain the difference between direct and indirect observation in determining population size. 100 points, come get em!

      What is direct observation? Looking at a population and just counting how many there are. What is indirect observation? ... When a population is too large or is spread over a too large of an area to possibly count the ecologist makes an estimate.

Explanation:

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im pretty sure its none of them

all 4 come together due to gravity

all objects have gravity, even atoms

but their gravitational force is very low and it takes a long time for them to become closer together