Which one ? Lol

i pretty sure ur right

Explanation:

because in the example they were born with those instincts

You are right.

Animals have the ability to perform a behavior. It's like the first time it is exposed to the proper stimulus.

If you don't know what is a stimulus it is, "a thing or event that evokes a specific functional reaction in an organ or tissue."

That's were instincts come from.

the answer is d. chordata