Answer:
This is true, opportunity cost does mean how much you have to spend to do something
Answer:
The correct answer would be, The most important trait of public goods is that they are non exclude-able and nonrivalrous.
Explanation:
Public goods are the goods that are provided by the government of a country for the general public of that country and each and every person of the country can use those goods. The most common examples of public goods are rides in parks, benches, shades of trees, public washrooms, public recreational parks, etc.
The public goods are non exclude-able and nonrivalrous because no one can be excluded from using these goods and the use of these goods by one cannot reduce the availability of it for the others.
Your answer would be C- plates. because the plates float on the plastic mantle which is located below the crust
