Which of the following terms refers to animals that are kept primarily for companionship?

The term that refers to animals kept primarily for companionship is pets. Pets are domesticated animals that people choose to have in their homes primarily for emotional support, companionship, and pleasure rather than for agricultural or economic purposes.

Production animals are typically raised for commercial use, such as for food, milk, or work. Livestock also refers to animals that are bred for agricultural production, including cattle, pigs, and sheep. Endangered species are animals at risk of extinction, which is unrelated to their role in human companionship. Pets occupy a unique space in human lives, providing personal relationships that contribute to their owners' well-being.