science, who ever answers this will get a brainlest

answer:
a.magma rises into the spaces where tectonic plates pull away from one another
explanation:
seafloor spreading occurs along mid-ocean ridges—large mountain ranges rising from the ocean floor. the mid-atlantic ridge, for instance, separates the north american plate from the eurasian plate, and the south american plate from the african plate.
good luck :)
i hope this helps
have a nice day !!