instruction:
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.
question:
Fact: an animal requires nutrients to grow and heal.
answer:
animal nutrients.


question:
Fact: Most invertebrates have a more complex nervous system.
answer:
Invertebrates.


question:
Fact: Infancy is the period of most rapid growth after birth.
answer:

Infancy.