Continent material is one piece of evidence of seafloor spreading. Option b is correct.
What is seafloor spreading?
Seafloor spread is a phenomenon that happens along mid-ocean ridges, when new oceanic crust is generated by volcanic activity and then progressively travels away from the ridge.
The geological activity of seafloor spreading occurs when tectonic plates split apart.
Continent material is one piece of evidence of seafloor spreading.
Hence, option b is correct.
To learn more about the seafloor spreading, refer to the link;
https://brainly.com/question/15122129
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