India though is diverse has a distinct geographical boundary which makes it a unique country.A place is classed as a subcontinent when it is part of a continent but is considered either geographically or politically as an independent entity or it is smaller than a continent. India is often called a subcontinent because it is
a distinct landmass, not just a country. While it has many features of a continent, it is not as big as one, so is not considered a continent. India was
once a continent (or at least a very large island). Due to continental drift,India moved north and became part of Asia. India is now joined with the
continent of Asia, but is a distinct area separated by the Himalayas. Originally
it was a separate geologic plate, but has collided and merged with Asia.Actually, Indian subcontinent does not constitute only India, but it alsoconstitutes other SAARC (South Asian Association for Regional Cooperation)countries that are Pakistan, Nepal, Bhutan, Bangladesh, Sri Lanka & Maldives. This group of countries are combined together to be called Indian subcontinent as once in the History, they were a part of India. But, because of their demands or due to some geographical positional reasons, they are now separate countries. But, now also these seven countries' geographical and climatic features match each other because of the reason that geographically also they were joined together, and again this was the reason because of which the Indian subcontinent's climatic and geographical features are different from other countries of Continent of Asia.