2. Underline the correct word. 1. Zoos play an important role/ cycle in animal conservation. 2. Cars burn/ emit petrol. 3. Animals should live i

2. Underline the correct word. 1. Zoos play an important role/ cycle in animal conservation. 2. Cars burn/ emit petrol. 3. Animals should live in their natural ecology/ habitat. 4. Acid rain causes/ poisons trees and plant. 5. He made off/up the whole story.