What is the concept of 'self-defense'?

The concept of 'self-defense' refers specifically to a legal justification that allows an individual to use reasonable force to protect themselves from imminent harm or danger. This principle recognizes the right of individuals to defend themselves against an immediate threat to their safety. The key elements of self-defense include the necessity of the response to be proportional to the threat faced and that the threat must be imminent.

This understanding places a strong emphasis on the context in which self-defense is invoked—namely, that it is a protective measure taken in response to an immediate and unlawful attack. The logic behind self-defense is rooted in the need to preserve one's own safety and to prevent greater harm that could result from an attack.

The other options relate to different legal concepts that do not capture the essence of 'self-defense.' For instance, an explanation that suggests self-defense is a justification for escaping legal consequences misunderstands its purpose. Similarly, providing financial support during litigation or tactics used to delay court proceedings are unrelated to the fundamental right to defend oneself from physical harm. Thus, the correct answer accurately reflects the legal principles surrounding self-defense.