Select the most appropriate option to fill in blank number (1)
Show answer & explanation
Correct answer: B
Explanation
The correct answer is Option 2 i.e. of.
The sentence wants to state that tourism belongs to or is a part of the biggest businesses.
Use of preposition 'of' :
- Used for belonging to, relating to, or connected with.
- Used to indicate reference.
- Used to indicate an amount or number.
Thus, the blank needs the preposition 'of' which expresses the relationship between a part and a whole.
Hence, the correct answer is Option 2 i.e. of.