What is the meaning of "precursor"?

The term "precursor" is correctly defined as an indication of the approach of something or someone. In various contexts, a precursor refers to something that comes before another thing, often serving as a sign or signal indicating that something is about to occur. For example, certain environmental changes can act as precursors to natural disasters, suggesting that a significant event is imminent.

Understanding this definition helps highlight the relational aspect of the word; it emphasizes the connection between the precursor and the subsequent event or development it foreshadows. In contrast, the other choices do not align with the established meaning of "precursor." They focus on outcomes or opinions, which do not capture the essence of something that precedes or signals what is to come.