Relative clauses

The dolphins _______ we saw at the aquarium were performing impressive tricks

• Which

• That

1. Dolphins, _______ are known for their intelligence, often live in social groups called pods.

• which

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1. The echolocation system ______ dolphins use helps them navigate and hunt in dark waters.

• Which

• That

1. The bottlenose dolphin, ______ is the most common species, is often found in warm waters.

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• That

1. Dolphins have a unique communication system ______ scientists are still trying to fully understand.

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• That

1. The dolphin ______ was rescued from the beach is now recovering in a marine sanctuary.

• Which

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1. The dolphin ______ was trained by the marine biologist learned new tricks quickly.

• which

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1. The species of dolphin ______ inhabits the Amazon River is known as the pink river dolphin.

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1. The sounds _______ dolphins produce are used for communication and echolocation.

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1. Dolphins, ______ are found in oceans all over the world, are excellent swimmers.

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• That