Answer:
A. Non-consumptive use.
A. Are used for direct subsistence by people who collect them.
Step-by-step explanation:
Existence value simply refers to the satisfaction a person derives from the knowledge that something exists. He may not have a direct use for the commodity at the time , but just knowing that the material exists, serves as utility to him. This is the non-consumptive use.
Most natural resources like marine life and trees in the forests provide existence value to many. These natural resources can be used in a subsistence level by people who have access to them. For example, in local settings, trees can serve as firewood to people.