A resource that everyone has access to and that can easily be overused or destroyed; examples include the atmosphere and the oceans.

• A. Poverty Rate
• B. Common Resource
• C. Government Failure
• D. Tax Incidence

Answer: (B)

Common resource is the right idea because it describes a resource that many people can access and that is difficult to exclude others from using. Because it’s shared and not easy to restrict, individuals may consume more or pollute more than is sustainable, leading to depletion or degradation. That’s the classic setup behind the tragedy of the commons, where without rules, property rights, or cooperative management, the atmosphere and oceans can be overused or harmed even though everyone would be better off if usage were kept within limits. The other options don’t fit this concept: a poverty rate is a measure of well-being, government failure refers to inefficiencies in policy, and tax incidence is about who bears the burden of a tax.