Their idea of holiday ______ at a luxury resort.
Their idea of holiday ______ at a luxury resort.
Explanation
Their idea of holiday is to relax at a luxury resort.
چھٹی کے بارے میں ان کا خیال ایک عیش و آرام کی ریزورٹ میں آرام کرنا ہے۔
The phrase "Their idea of holiday" suggests a preference or definition, which is correctly followed by "is to relax" (infinitive form).