Which countries are on the peninsula?

India and South Korea are the countries present in Peninsula.

Explanation:

The country surrounds three sides by water surface and remaining one side by Land is called Peninsular country. Deccan peninsula in India is the one of the biggest peninsular region around the world. It was composed by the lava from volcanoes which have major metallic and non metallic minerals. Korean peninsula is the connected in the china mainland, North Korea and South Korea are the two countries are present in that peninsula.  

heat from the core of the earth causes convection currents to occur in the mantle. these currents slowly move the crust around.