Under what circumstances is a person justified in using force against another?

The use of force against another person is justified when it is deemed necessary to prevent an imminent threat, such as trespassing or criminal interference. In such situations, an individual who reasonably believes that force is required to protect themselves or their property has the legal standing to use that force. The key element here is that the use of force must be reasonable and proportional to the threat faced. This principle is based on self-defense laws, which allow individuals to take necessary actions to protect themselves from harm or safeguard their rights.

In contrast, other circumstances presented do not justify the use of force. Protecting oneself from verbal insults does not reasonably warrant a physical response. Using force to teach someone a lesson or out of anger does not meet the threshold of necessity or proportionality that the law requires for justifiable force. Thus, the correct answer highlights a clear legal framework under which force can be justifiably employed to protect oneself from criminal activities.