Question

Passage- NOTE MAKING please someone make notes of this passage for board exam
A dolphin is an aquatic mammal. Dolphins are extremely intelligent and sociable animals and have their own way to communicate with each other using special sounds. Although they are often mistaken for fish, dolphins are actually mammals. They are members of the Cetacea (pronounced set-ay-shia) family, which also contains whales and porpoises. One way of telling the difference between a cetacean and a fish is by looking at their tails. You can tell a cetacean because their tail fins (called flukes) are horizontal and move up and down. Fish have vertical tails which move from side to side. A dolphin's body is designed. ​

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This is called echolocation. Echolocation works when a dolphin bounces a high pitched sound off an object and then listens for the echo to come back. It is a very useful way for dolphins to find food and navigate. Dolphins communicate with each other through clicks, squeaks and whistles.