In this task, you need to write a topic word from the given fact. The topic word must have at least one word overlap with the given fact. The topic word often involves adding a new word from a related concept. In your topic word, use at least one word from the given fact. Topic words with two or more words work best.

Fact: Bone is less flexible than cartilage but stronger.
bone cartilage.

Fact: threatening behavior causes a fight-or-flight response in animals.
animal animalia members.

Fact: Babies that are very large or very small at birth are less likely to survive.

babies premature small.