Select the most appropriate option to fill in the blank.

Their idea of a holiday _______ at a luxury resort.

is relaxing

The most appropriate option to fill in the blank is is relaxing.

• The verb "is" is used to indicate a state of being.
• The adjective "relaxed" means feeling calm and at ease.
• The phrase "to relaxing" is not grammatically correct.
• The verb "relax" means to make or become less tense or anxious.