Directions: Read the passage given below and answer the questions that follow:

Dolphins are highly intelligent marine mammals known for their playful behavior and complex social structures. Commonly found in oceans worldwide, dolphins belong to the family Delphinidae and prefer warmer tropical waters. These creatures are carnivorous, feeding mainly on fish and squid. A unique feature of dolphins is their echolocation ability, which allows them to navigate and hunt effectively by emitting sound waves and listening for echoes. Dolphins communicate with each other using a variety of clicks, whistles, and body movements. Unfortunately, their populations are threatened by human activities such as fishing, pollution, and habitat destruction.