Please Help!! ;v; According to the theory proposed by Harry Hess, what causes continents to move?

0 continental drift

0 magnetic polarity

0 seafloor spreading

0 deep-ocean trenches

The gulf stream is a warm water current that flows away from the equator to northern europe. witch of these does it cause. a. crashes of warm and cool water in the ocean b.colder climates near the equator c.large waves on the cost of europe d.warm climates in northern europe

The identities of substances are the same before and after which type of change

Light waves travel than sound waves.