Answer:
Step-by-step explanation:
They may look similar as both have cables, towers and roadway underneath. But the key difference in a cable-stayed bridge and suspension bridge is the way cables are tied to a tower.
In a cable-stayed bridge, the cables are tied and secured directly onto the tower. So the weight of roadway and vehicles are carried directly through cables by the towers.
In a suspension bridge, the suspension cables ride on the tower. They are not secured at the towers but instead are tied at both ends of the bridge. The weight of roadway and vehicles are carried through vertical suspenders onto the suspension cables.
Thank you for a very good engineering question!