Category theory is a branch of mathematics that studies structures and their relationships.

The rhizosphere plays a very important role in plant growth.

The geosphere refers to the solid part of the Earth.

I work in the capital city area.

I was born and raised in the National Capital Region.

His nature is very kind, and he is liked by everyone.

Let's calculate using integers.

He is wearing a formal suit.

No one should judge him for his sexual orientation.

This is an unofficial meeting.