What property was used as evidence to support seafloor spreading?

magnetism

sonar

density

boiling point

Evidence for Sea-Floor Spreading. Several types of evidence supported Hess's theory of sea-floor spreading: eruptions of molten material, magnetic stripes in the rock of the ocean floor, and the ages of the rocks themselves. This evidence led scientists to look again at Wegener's hypothesis of continental drift hopefully this helps! Good luck please mark brain if so:)

The answer is make electricity