Select the word which means the same as the group of words given.

Person or animal living on another

Parasite

The word which means the same as the group of words "person or animal living on another" is parasite.

• Pupil is a young person who is learning under a teacher.
• Heir is a person who inherits the property of another person.
• Successor is a person who takes over the position of another person.

The word parasite is the most appropriate because it specifically refers to an organism that lives on or in another organism and benefits from it without giving anything in return. The other words do not have the same connotation of dependence.