Explanation:

India is a country located in South Asia and is surrounded by water bodies on three sides - the Arabian Sea to the west, the Bay of Bengal to the east, and the Indian Ocean to the south. On the north, it shares its land border with several countries including Pakistan, China, Nepal, Bhutan, Bangladesh, and Myanmar.

Peninsula:
A peninsula is a landmass that is surrounded by water on three sides and connected to a larger landmass on the fourth side. India fits this definition as it is surrounded by water bodies on three sides (the Arabian Sea, the Bay of Bengal, and the Indian Ocean) and is connected to the larger landmass of Asia on the north.

Continent:
A continent is a large, continuous mass of land that is not completely surrounded by water. India is not a continent because it is not a large enough landmass to be considered a continent on its own. It is part of the larger continent of Asia.

Sub-continent:
A sub-continent is a large, distinct landmass that is smaller than a continent but larger than a single country. India is often referred to as a sub-continent because of its size, diverse geography, and population. It is the seventh-largest country in the world by land area and the second-most populous country.

Island:
An island is a landmass that is completely surrounded by water. India is not an island because it shares its land border with several countries and is connected to the larger landmass of Asia.

Conclusion:
Based on the description provided, India is best described as a peninsula. It is surrounded by water bodies on three sides (the Arabian Sea, the Bay of Bengal, and the Indian Ocean) and is connected to the larger landmass of Asia on the north.