What are the two major factors that cause the islands in the northwest of the island chain of Hawaii to decrease in elevation

Tectonic movement and Erosion.

Explanation:

As the island continues to moves in the northwest direction and away from the hotspot they can get eroded by the winds, rain, and get coveted to seamounts. Hawaii island is formed by the tectonic movement of the pacific ocean floor.

You will lose your drivers license along with your license plate.

Answer the collision of tectonic plates;