Final answer:
The formation of the Himalayas and Appalachians is associated with a type of plate boundary known as a convergent boundary.
Step-by-step explanation:
The formation of the Himalayas and Appalachians is associated with a type of plate boundary known as a convergent boundary. A convergent boundary occurs when two tectonic plates collide and are forced together. In the case of the Himalayas, the collision of the Indian Plate with the Eurasian Plate has led to the uplift and formation of this mountain range, while the Appalachians were formed millions of years ago when the North American Plate and African Plate collided.
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