Which of the following is an example of a positive externality?

A positive externality occurs when an action by one person or business has beneficial effects on others who are not directly involved. For example, if a homeowner decides to plant beautiful flowers and maintain a well-kept garden, it not only improves their property but also makes the neighborhood look nicer for everyone. As a result, property values may increase, and neighbors may feel happier walking in their area. This is a positive externality because the homeowner’s decision to beautify their yard positively impacts others without them having to pay for it. So, in this case, the benefits extend beyond the homeowner to the whole community.