He is suffering from severe depression.

He was hospitalized due to thrombosis.

The use of renewable energy helps protect the global environment.

He is facing many difficulties due to gender identity disorder.

Gender discrimination is one of the social issues that needs to be resolved.

It's difficult to understand his real nature.

Rabbits are herbivorous animals.

Lions are carnivorous animals.

Owls are nocturnal animals, they are active at night.

Education about sexual relations is important for young people to make healthy choices.