It started raining all of a sudden.

When it snows, the whole town turns white.

The elevator descended to the basement.

That disease is caused by a mutation.

He was demoted.

He was demoted because of his poor performance.

This polynomial is represented in descending powers.

His salary was reduced because the company's financial situation worsened.

Due to the economic crisis, the company decided to reduce everyone's salary.

I found a sea hare at the beach.