Read the given passage and answer the questions that follow.

Dolphins are small-toothed cetaceans easily recognisable by their curved mouths, which give them a permanent ‘smile’. There are 36 dolphin species, found in every ocean. Most dolphins are marine and live in the ocean or brackish waters along coastlines. There are a few species, however, like the South Asian river dolphin and the Amazon river dolphin, or boto, that live in freshwater streams and rivers. The largest dolphin, the orca, can grow to be over 30 feet long. The smallest, the Maui dolphin, is just five feet long.Select a suitable title for the passage.

Read the given passage and answer the questions that follow.

Dolphins are small-toothed cetaceans easily recognisable by their curved mouths, which give them a permanent ‘smile’. There are 36 dolphin species, found in every ocean. Most dolphins are marine and live in the ocean or brackish waters along coastlines. There are a few species, however, like the South Asian river dolphin and the Amazon river dolphin, or boto, that live in freshwater streams and rivers. The largest dolphin, the orca, can grow to be over 30 feet long. The smallest, the Maui dolphin, is just five feet long.Select a suitable title for the passage.