According to the plate tectonics theory, the Himalaya Mountains and Tibetan Plateau formed because the Indian Plate

Explanation:

The Himalayan mountain range and Tibetan plateau have formed as a result of the collision between the Indian Plate and Eurasian Plate which began 50 million years ago and continues today.

answer; seasons change because earth tilts on its axis; and the angle of the tilt causes the northern and southern hemisphere to trade places throughout the year;