The source of this river is at the top of the mountain.

Population fluctuations greatly affect the economic situation.

This area requires strict caution because earthquakes occur frequently.

The place of origin of this wine is France.

This problem requires strict analysis.

The false rumor hurt his reputation.

He continues his journey to find his own utopia.

Humans can make mistakes.

Protists are single-celled organisms that live in water.

He is of a serious and honest character, and is respected by everyone.