Explanation:

- The question: you're looking for a word that means “a person who eats human flesh.”

- Option 1: scavenger. This usually refers to animals (or sometimes people) who eat dead or decaying matter—not specifically human flesh. Think vultures or hyenas.

- Option 2: tribal. This word simply describes a group or community living together, often with shared customs. Nothing about eating habits here, let alone eating people.

- Option 3: carnivore. A carnivore eats meat, but that meat could be any animal, not specifically humans. Lions, wolves—meat-eating animals.

- Option 4: cannibal. Here’s your match. A cannibal is someone who eats the flesh of their own kind—in humans, that means another human.

So,  Option 4 (cannibal) is correct.