The term 'Motion Carriers' refers to vehicles that are used to transport people or goods from one place to another. The crossword solution for this term is 'AYES, ' which stands for Automobiles, Yachts, Elevators, and Ships. Automobiles are the most common form of motion carriers, as they are used to transport people and goods on land. Yachts are used to transport people and goods on water, while elevators are used to move people and goods vertically. Finally, ships are used to transport people and goods across oceans and other large bodies of water.