Select the most appropriate option to fill in blank number 5.
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. availability.
- The sentence discusses planting trees to ensure the availability of adequate oxygen to people.
- "Availability" fits contextually as it means the presence or accessibility of something, which is the intended meaning in this sentence.
- The other options, such as "shortage," "lack," or "mix," do not convey the same sense of ensuring an adequate supply of oxygen, so they are not suitable choices in this context.
Hence, the correct option would be availability.