Answer:
a. tragedy of the commons
Step-by-step explanation:
The tragedy of the commons is a situation whereby shared resource system where individual users, who are acting by not depending on others according to their own personal gains , behave differently for the good of users by sharing or depleting the resources shared through coming together and doing what is right. We can see how the Minnesota state park service institutes a variable fee structure from when the park is use not much and when it is also overcrowded.