A suspension bridge is a type of bridge that is supported by cables, which are the main structural elements of the bridge. The cables are connected to towers on either side of the bridge and are held in tension to support the deck of the bridge. Cables are typically made of steel and are composed of many individual strands of wire that are twisted together. The cables are then connected to the towers and the deck of the bridge, providing the necessary strength and stability for the bridge to remain standing.