Select the most appropriate option to fill in the blank.
Their idea of a holiday ______ at a luxury resort.

Correct option is A

The correct option to fill in the blank is (a) is relaxing.
Explanation:
The sentence is describing what their idea of a holiday is – and the word that fits naturally in this context is the gerund (verb+ing) form “relaxing”.
After “is”, we can use a gerund to describe a concept or experience.
Example:
✔ My idea of fun is swimming in the sea.
Why other options are incorrect:
· is relax: Incorrect – "relax" is the base verb, not suitable after “is” when used as a complement. (relax = आराम करना)
· is relaxed: Incorrect – “relaxed” is a past participle/adjective, not fitting the context of describing an activity. (relaxed = आराम महसूस करना)
· is to relaxing: Incorrect – “to” should be followed by base verb, not gerund. (to relaxing ❌ → to relax ✅)
�� Info Booster:
“Gerund” form (verb+ing) is used after be verbs when referring to general ideas or activities.
Structure: Subject + is/was + verb-ing (gerund) = general idea