Final answer:
Vajrayana Buddhism is a variant of Mahayana Buddhism, not Theravada Buddhism.
Step-by-step explanation:
Vajrayana Buddhism is not a variant of Theravada Buddhism. Vajrayana Buddhism is a variant of Mahayana Buddhism, which is more popular in China, Korea, Japan, and parts of Vietnam. It is characterized by its emphasis on meditation, universal compassion, and selflessness. On the other hand, Theravada Buddhism is the oldest branch of Buddhism and is most prominent in Southeast Asia and Sri Lanka. It focuses on following the original teachings of the Buddha and emphasizes meditation and concentration as keys to enlightenment.