Final answer:
A public good is characterized by being nonexcludable and non-rival, meaning users can collectively consume benefits without preventing others from using the good. The correct attribute of a public good regarding this question is that users collectively consume benefits.
Step-by-step explanation:
The property of a public good is that it has two main characteristics: it is nonexcludable and non-rival. Users collectively consume the benefits of a public good, which means when one person uses the good, it does not prevent others from using it as well. Given this, the correct answer to the question is that a public good's attribute is that users collectively consume benefits.
Free riders cannot be excluded from using the good, making it difficult for markets to produce public goods, as these individuals aim to use the good without contributing financially. However, through various measures such as government action or social pressures, it is possible to manage the free rider problem and ensure that those who benefit from the public good contribute to its provision.