The correct answer is: a) Graceful forms and detailed ornamentation.
Tamil Nadu bronze sculptures of deities are renowned for their graceful forms and detailed ornamentation. The sculptures are often made of bronze, which is a type of metal that is both strong and durable. The sculptures are typically very detailed, with intricate patterns and designs. The sculptures are often used in religious ceremonies and rituals.
Option b) is incorrect because Tamil Nadu bronze sculptures of deities are not typically monumental in size. Option c) is incorrect because Tamil Nadu bronze sculptures of deities are not typically abstract or geometric in design. Option d) is incorrect because Tamil Nadu bronze sculptures of deities are not typically whimsical or playful in theme.