Question

in biology, variation means...
animals are all identical
i wear a red shirt on monday and a blue shirt on tuesday.
i eat a variety of food.
being born with slightly different traits

Explanation:

In biology, variation refers to differences in traits among individuals. The option "being born with slightly different traits" aligns with this biological concept. The other options are not related to biological variation: "animals are all identical" is the opposite of variation; "I wear a red shirt on Monday and a blue shirt on Tuesday" is about clothing choice, not biology; "I eat a variety of food" is about diet, not biological traits.

Answer:

being born with slightly different traits