The wind blew, and the flower petals fluttered up.

The calyx is a part of the flower that plays a role in protecting the petals.

He worked hard to accomplish his goals.

Part of this movie is based on actual events.

His role is the team leader.

She loves flowers.

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

He did his best to protect me from danger.

He received the letter challenging him to a duel and began preparing for the duel.

Gender roles are an important element in defining individual behavior in society.