Writers often use words like it, them, and they to refer back to someone or something that was introduced earlier. Paying attention to these words will help you better understand how ideas are connected.

The sentences below come from the passage. Read each sentence and look at the underlined word. Find the word or words that it refers to and write them in the box.

1. A cephalopod can move these cells toward or away from its skin. This allows it to change the pattern and color of its appearance. / a

2. For example, cephalopods can blend in to the color of the sea floor, making them invisible to predators. /

3. This makes the squid appear much bigger than it really is. / the

4. Amazingly, reef squid can send two messages at the same time. They can send one message on their right side and a different message on their left side. /

5. For example, when males are searching for a mate, they flash attractive patterns on one side of their body. /