Final answer:
Seafloor spreading takes place at divergent boundaries
Step-by-step explanation:
According to the Plate Tectonics theory, seafloor spreading takes place at a divergent boundary. Divergent boundaries occur when two plates move away from each other, leading to the creation of new crust. Example of a divergent boundary is the Mid-Atlantic Ridge where seafloor spreading is actively occurring.
Learn more about plate tectonics and seafloor spreading