<span>D. Overcrowding and destruction of rain forests</span>
The Country which is surrounded by water on all sides are known as "Islands" and there could be many examples like: "Britain, Ireland" etc..
Hope this helps!
The largest country in the world would be Russia, being as it has a total of 6,601,667 square miles. I Hope this helps :).
India - Deccan Plateau
Pakistan - Khyber Pass
Sri Lanka - Mount Pidurutalagala
Nepal - Mount Everest