Explanation:

- Actus reus refers to "the guilty act." It is the physical act or unlawful omission that constitutes a crime.

- Correct Answer: Option 3 - The guilty act

- Option 1: Moral guilt refers to a personal sense of responsibility or remorse for actions. It's not a legal term.

- Option 2: The guilty mind is known as "mens rea," which means the mental state or intent to commit a crime.

- Option 4: A feeling of guilt is a personal emotional response and not a legal concept.