Anita wore a beautiful broach (A)/brooch (B) on the lapel of her jacket.
If you want to complain about the amenities in your neighbourhood, please meet your councillor(A)/counsellor(B).
I would like your advice(A)/advise(B) on which job I should choose.
The last scene provided a climactic(A)/climatic(B) ending to the film.
Jeans that flair(A)/flare(B) at the bottom are in fashion these days.

Brooch is a beautiful pin worn by women . Hence should be used in 1st sentence.
Councillor is a member of council.Hence councillor should be used instead of counsellor who is a person who gives advice about problems.
Advice is a noun. It means a suggestion for a beneficial course of action. Advise is a verb. It means to give advice.So Advice should be used here.
Climactic is adjective form of climax. Hence is proper for usage in 4th sentence.
Flare is a shape that spreads outwards. Flair means natural talent . hence , flare is correct in given context.