3. Analyze: From the observations you made above, can you state exactly why the aliens changed their shape? Why or why not?

They changed their shape.

Explanation:

The aliens  changed their shape because their shapes makes the people frightened. Their shape structure is different from the humans so they change their shape in order to walk among people easily and interact with people which they can't do with their real body structure. So that's why they changed their shape when they interact with people or to walk among people.

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genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).