3. Which of the following is NOT an example of a public good? An apple A city park Roads The US military

The correct answer is: An apple.<br /><br />Explanation: A public good is a product that one individual can consume without reducing its availability to others, and from which no one is excluded. Examples of public goods include a city park, roads, and the US military. An apple, on the other hand, is a private good because its consumption by one individual prevents others from consuming it.