Which sentence states a fact?
Tomato plants, with their bright colors and sturdy vines, make attractive additions to home gardens. Certain insects help flowering plants reproduce by moving pollen between the plant's different parts.
A fact is something that can be proved by research or observation.
Napoleon Bonaparte was shorter than King Louis XVI.
The statement above is a fact. The statement can be proved by researching the height of each man and comparing them.
An opinion is something that a person believes, thinks, or feels. An opinion cannot be proved.
Napoleon Bonaparte was a better leader than King Louis XVI.
The statement above is an opinion. People can have different ideas about what makes someone a "better" leader, so the statement cannot be proved.
The first sentence states a fact.
Certain insects help flowering plants reproduce by moving pollen between the plant's different parts.
It can be proved by reading an article about how flowering plants are pollinated.
The second sentence states an opinion.
Tomato plants, with their bright colors and sturdy vines, make attractive additions to home gardens.
Attractive shows what a person believes, thinks, or feels. Another person might have a different opinion about which plants make home gardens attractive.