He thinks that war is a necessary evil.

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.

Chameleons can change their camouflage color to match their surroundings.

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

He committed another crime while on probation.

This sanctuary plays a crucial role as a habitat for endangered species.

She was raised by an overprotective mother.

She was raised by overprotective parents.