Final answer:
A Mandapa is the large hall leading to a Hindu temple, used for religious activities such as dancing and music.
Step-by-step explanation:
The large, porch-like hall leading to a Hindu temple and used for religious dancing and music is known as a Mandapa. This architectural feature is common in Indian temples and serves as a space where devotees can participate in various ceremonial and devotional activities such as music, dance, and prayer. The Mandapa can be a separate structure or an integral part of the temple complex, often elaborately decorated with carvings and pillars that reflect the grandeur of Hindu temple architecture.