Which sentence states a fact?
A: The modern trumpet is an instrument made of brass.
B: Music from a trumpet sounds more pleasant than music from a flute.
The second sentence states a fact.
The modern trumpet is an instrument made of brass.
It can be proved by reading a book about music instruments.
The first sentence states an opinion.
Music from a trumpet sounds more pleasant than music from a flute.
More pleasant shows what a person believes, thinks, or feels. Another person might have a different opinion about what sounds pleasant.