The correct answer to this question is B) Asteroid Impact.
All of the other answer choices can and have been caused by humans, such as Habitat loss, Over exploitation, and Invasive species.
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Examples of surface tension:
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Walking on water: Small insects such as the water strider can walk on water because their weight is not enough to penetrate the surface.
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Floating a needle: A carefully placed small needle can be made to float on the surface of water even though it is several times as dense as water.
The answer is b it occurs in plant animals and bacteria
<span>Starch are macromolecules that are made of monomers that are simple sugars. Cells are microscopic and they can only absorb small substances. Therefore starch needs to be digested in other words broken down into simpler substances that can be taken in by cells. Therefore before starch can enter a cell it must be 3) digested to form simple sugars</span>
