Given a scientific question, generate a correct answer to it.

Ex Input:
Which is larger: the human sperm or the human egg?

Ex Output:
human egg

Ex Input:
What term is used to describe birds that hunt, eat mammals, and other birds?

Ex Output:
raptors

Ex Input:
What is the condition in which the thyroid gland is overactive is known as?

Ex Output:
hyperthyroidism