Sarah felt very anxious after shaking hands with someone who looked like he had a cold, but washing her hands made her feel better.

Obsessive-compulsive disorder.

Explanation:

Obsessive-compulsive disorder: In psychology, the term "obsessive-compulsive disorder" is determined as a mental disorder in which a person feels or experiences unwanted and recurring ideas, thoughts, and sensations which is referred as obsessions that generally makes the person driven to perform a specific task repeatedly and is referred as compulsions.

this statement is true.

forests are public goods, available for everybody. when usage of such a good becomes interesting for consumers and its usage increases, there can be a risk of overexploitation. it is a non rival good therefore, if one person consumes the good it does not reduce the availability for subsequent consumers.

these caracteristics require the establishment of measures in order to prevent the destruction of a commonly owned space, for example, to restrict the amount of people that have access to the same time.