Alligators are dangerous animals! They are cute when they are small, and some people have tried to make them pets. As they grow older, the alligators grow very sharp teeth and gain lots of strength. They are not friendly animals and do not enjoy human company. It is uncommon, but alligators will attack humans. If you see an alligator, by all means, stay away from this dangerous animal!
Sometimes the writer will make it a little harder. He will want you to make a decision about a hidden message. Try to find the main idea of the alligator paragraph among these choices:

Alligators have sharp teeth.


Alligators will attack humans.


Alligators do not make good pets.


If these are your choices, then the main reason the writer wrote this paragraph is to tell you that alligators do not make good pets! In fact, he tells you to stay away from alligators, because they have sharp teeth and will attack humans. This type of question causes you to infer the writer’s hidden meaning.