<h2>
Answer:</h2>
Himalaya Mountains
<h2>
Explanation:</h2>
The Himalaya mountains extend for about 2,500 kilometers (1,550 miles), separating the Indian subcontinent from the rest of Asia. The Indian subcontinent, once connected to Africa, collided with the Eurasian continent about 50 million to 55 million years ago, forming the Himalayas.
The Chinese constructed the "Great Wall of China." Some difficulties they had to face was possible invasion whilst they were vulnerable and focused on building the wall, invading animals, foreign lands, malfunctions with the building materials, (great stone blocks,) and possible death, since they were building in sometimes treacherous conditions.
<span>The correct answer here is C. From studying early cave painting, scientists are able to conclude that early humans expressed themselves creatively. This is obviously just not from one set of cave paintings, but from the great variety of different artistic styles that can be seen the world over in this ancient art.</span>
