I was moved by his sincerity.

His nature is very kind.

He is an expert in ethology, and his research is highly regarded worldwide.

Gender identity refers to the gender that each individual recognizes themselves as.

He likes to take a walk in the park at dusk.

The exam ended and the results were good, so I thought 'all's well that ends well'.

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.