Population decline is a serious problem.

He prostrated before the king to show respect.

The house sold for a good price.

I will be in charge of part of this project.

He was wearing an ancient mourning dress.

This area is unattended, and there is no one even if someone asks for help.

He is good at playing the ocarina.

My hobby is martial arts.

He spoke loudly to act ferociously and manly in expressing his opinion.

His words were a clear insult.