This zoo is putting a lot of effort into the protection of endangered species.

He did his best to protect me from danger.

He abused his power.

He learned about the structure of society in his civics class.

They (referring to women or girls) are my best friends.

He likes talking about himself and often talks about his experiences and thoughts.

He asked me about the secret, but I remembered the proverb 'to fall into speaking', and said nothing.

This animal is a protected species, so you must never touch it.

Protectionist policies are adopted to protect domestic industries from foreign competition.

The consent of the guardian is necessary.