Electromagnetic radiation conveys energy in forms such as light and radio waves.

His nature is very kind.

Detailed information is needed to understand the nature of that project.

I was moved by his sincerity.

His nature is very kind.

He was released from the suffering of this world.

In biology, a subkingdom is one of the large units in taxonomy.

Learning about the history of the frontier is important for understanding our past.

The animal kingdom is incredibly diverse, and it is said that there are still species that have not been discovered.

The animal kingdom is known for its diversity and complexity.