Geologically, Manipur is part of the:

Indo-Gangetic Plain
Deccan Plateau
Himalayan Fold Belt
Peninsular Shield

Geologically, Manipur is part of the Indo-Gangetic Plain. The Indo-Gangetic Plain is a vast alluvial plain in the northern Indian subcontinent. It is formed by the deposition of sediments from the Indus, Ganges, and Brahmaputra rivers. The plain is home to a large population and is a major agricultural region.

The Deccan Plateau is a large plateau in the southern Indian subcontinent. It is formed by the Deccan Trap, a large igneous plateau. The plateau is home to a number of important historical and cultural sites.

The Himalayan Fold Belt is a mountain range that runs along the northern border of India. It is formed by the collision of the Indian and Eurasian tectonic plates. The Himalayas are the highest mountain range in the world and are home to a number of important rivers, including the Ganges and Brahmaputra.

The Peninsular Shield is a large geological formation that underlies the Indian subcontinent. It is formed by ancient igneous and metamorphic rocks. The Peninsular Shield is home to a number of important mineral deposits.

In conclusion, the correct answer to the question “Geologically, Manipur is part of the:” is the Indo-Gangetic Plain.