Who is considered a donor?

A donor is defined as an individual or entity that gives something, typically without expecting anything in return. This concept is most commonly associated with philanthropy, charitable contributions, or gifts. In various contexts, donors can provide financial support, physical goods, or even time and expertise to help causes, organizations, or individuals in need.

The other choices involve concepts of exchange or receipt and do not align with the core definition of a donor. Selling a product involves a transaction for payment, while receiving or borrowing indicates a positional relationship where something is gained rather than willingly given. Understanding the term "donor" in its purest form highlights the act of giving selflessly, which is essential in discussions related to charitable acts, fundraising, and community support.