Which statement about the Shiwalik Range is correct?

Correct answer: It is the outer and southern range of the Himalayas

Option D is correct because the Shiwalik Range, also called the Outer Himalaya, forms the southernmost and outermost belt of the Himalayan system. It is generally lower and geologically younger than the higher Himalayan ranges. The Shiwaliks are made largely of unconsolidated sediments brought down from the higher mountains, and valleys called duns occur in some areas between the Shiwalik and Lesser Himalayan ranges. Option A wrongly places it in the Deccan, option B confuses it with a peak of the Aravallis, and option C describes neither its location nor its nature. Therefore D is the only accurate statement.