What word is 1. used to show the reason for something being done?
2. used to give an opinion that might seem to be the opposite of what came before?
3. used to show a contrast or comparison with something else?​

1.) motive

2.) Contrary

3.) Unlike, similar

Explanation:

The word motive is used to describe 'why' a particular action or deed was carried out. It explains the in tension or what one wants to achieve or derive by indulging a certain act. It could be used in a sentence as ;

Finally, the writer narrated the motive behind his long awaited new book.

Contrary is a term used to present an opinion, view which seems quite different from an initial perception. It could be used in a sentence thus ;

The second observer gave a contrary opinion on the recent happenings in the area.

C.) There are so many words used to show contrast or compare two likes or alternatives, those words may include, while, unlike, similarly, and so on.

a. it reminds protestors of the reasons they have to protest.

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