Select the most appropriate option for blank (1).
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. trap.
Trap means to capture and store something. Greenhouse gases are known to trap heat that warms Earth's atmosphere. Hence, option 3 is the correct answer.
Other options mean:
- bark is the sound of dog.
- waste is something that is of no use.
- hang means to hold.