1M dollar question: whose or which for plural innanimates?

English as a Second Language English Vocabulary, Grammar and Idioms
1

I’ve been dying to know the correct answer. Never know which to use in my thesis.

Help please.

Here’s an example:

The tree whose leaves were falling died.

or

The tree which leaves were falling died.

2

The correct answer in your example is “whose”.

3

I´d say skiluck won the million