Which sentence states a fact?
Rainforests supply one out of every four ingredients used in modern medicine. People rely too heavily on the resources that rainforests provide.
A fact is something that can be proved to be true.
The month of July has more days than the month of June.
This is a fact. It can be proved by looking at a calendar and counting the number of days in each month.
An opinion is something that a person believes, thinks, or feels. An opinion cannot be proved true.
July is a better month than June for camping.
This is an opinion. People may have different opinions about which month is "better" for camping.
The second sentence states a fact.
Rainforests supply one out of every four ingredients used in modern medicine.
It can be proved by looking up where medicines come from.
The first sentence states an opinion.
People rely too heavily on the resources that rainforests provide.
Too heavily shows what a person believes, thinks, or feels. Another person might have a different opinion about how much people should rely on these resources.