The answer is: B
Explanation
The correct option is B: "right to sue."
"Locus Standi," also known as "standing" in legal terms, refers to the legal right or capacity to bring a case or lawsuit. It is the right of a party to appear and bring a case before a court. In this context, "right to sue" accurately captures the essence of locus standi, as it signifies the legal standing necessary for someone to initiate legal proceedings and seek a remedy in a court of law.
Option A, "one's personal interest," is related to the concept of standing, but it does not fully encapsulate the broader legal principle of locus standi. Options C and D, "right to be heard" and "right to intervene," touch on related concepts, but they do not precisely convey the primary meaning of locus standi, which is the right to bring a case or lawsuit.