Which sentence states a fact?
A: Evergreen trees keep their needles in winter.
B: Trees that have needles are ugly.
The first sentence states a fact.
Evergreen trees keep their needles in winter.
It can be proved by observing evergreen trees in winter.
The second sentence states an opinion.
Trees that have needles are ugly.
Ugly shows what a person believes, thinks, or feels. Another person might have a different opinion about which trees are ugly.