They were born on the same day. They have the same kinds of interests. They inherited the same characteristics from their parents. They were taught the same kinds of things at home.
I gave my students this multiple choice question: Why do identical twins usually look like each other?

Only one answer is correct among these 4 choices:
- They were born on the same day.
- They have the same kinds of interests.
- They inherited the same characteristics from their parents.
- They were taught the same kinds of things at home.

Could you tell me which one is correct?

They inherited the same characteristics from their parents.