Which is an example of a chemical change
frying an egg

boiling water

melting butter

chopping onions

Frying an egg

Explanation:

Frying an egg can be considered as an chemical change as it cannot be converted into the original form again. The bonds are broken and egg from the liquid form is converted into the solid form.

Chemical changes results in the formation of new substances and the changes that has been take place once cannot be reversed. The heat changes the egg's protein permanently and the process is known as protein denaturation. This process cannot be reversed.

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genetic variation will increase because of a new habitat and food source.

explanation: