Whose idea was it?

whose Pronoun

— Whose is used to ask what person something belongs to. Whose is this? There's no name on it. Whose coat did you take? — Whose is used to join a relative clause about a person or thing. Children whose parents smoke are more likely to smoke themselves. This is a country whose language is dying. The girl in the picture, whose name is Marion Russell, was from my home town.

idea Noun

— An idea is a concept or a thought. It was a good idea. — An idea is something abstract (not concrete). Love is just an idea. — An idea is a way to see something, a view. He changed her ideas on religion.

was Verb

— A form of the verb be used to talk about yourself, or another person in the past. I was singing in the shower. Who was that girl you were talking to?

it Pronoun

— used to refer to an object without identifying or describing it; the object might have been described earlier in the text. The house was very big. It had many rooms. — used to describe the weather It is very hot today. I'm staying in because it is raining — used to describe a situation in general I don't like it when people tell me to do something. It is hard to find a job.

it Abbreviation

— It can be a short way of writing: — # Italy or Italian — # Information Technology, the use of computers