Select the option that can be used as a one-word substitute for the given group of words.

One who dies for a noble cause

Martyr

The correct one-word substitute for one who dies for a noble cause is martyr.

• Martyr refers to a person who is killed because of their religious or political beliefs.
• Heretic refers to a person who holds religious beliefs that are considered unorthodox or unacceptable by a particular group.
• Butcher refers to a person who slaughters animals for food.
• Narcissist refers to a person who has an excessive interest in themselves and their own personal appearance.

Martyr is the most appropriate word for this group of words because it specifically refers to someone who dies for a cause that they believe in. The other words do not have the same connotation of self-sacrifice.