Question

medal
What is a "non-rivalrous good"?

Answer 1

A good that benefits the community as a whole
An item of unsurpassed quality
A good that is very difficult to prevent people from using
A good whose scarcity is unaffected by how many people use it

Answer 2

A rivalrous good is something that cannot be consumed/used by more than one consumer. Take food for instance, though you may share the food with someone else, the mouthful that you take can only be eaten by you and not anyone else. Non rivalrous goods are the opposite to this. They are goods that can be used by more than one person at any time without taking away from any one persons consumption/use and there is zero extra cost for additional users. For example, a park could be used by one person. Should additional people use the park, it will not impact use of the park by the the first person who turned up, that is assuming no-one is vandalising the park in any way.