The Shore Temple, a UNESCO World Heritage Site, is located in:

The correct answer is: a) Mahabalipuram.

Mahabalipuram is a town in Tamil Nadu, India, on the Coromandel Coast. It is known for its 7th-century rock-cut architecture, including the Shore Temple, a UNESCO World Heritage Site. The temple is a fine example of Dravidian architecture, and is one of the most important Hindu temples in India.

The other options are incorrect because:

• Chidambaram is a town in Tamil Nadu, India, known for its 11th-century Chola-era temple complex.
• Rameswaram is an island town in Tamil Nadu, India, located at the tip of the Indian peninsula. It is known for its 12th-century Ramanathaswamy Temple, one of the most important Hindu temples in India.
• Tiruchendur is a town in Tamil Nadu, India, known for its 7th-century Thiruchendur Murugan Temple, one of the most important Hindu temples in India.