Divergent boundaries produce seafloor spreading in the ocean and rift valleys at the continents. At this boundary, the tectonic plates separate from one another. Hence, a) option is correct.
Tectonic plates, which are large portions of the lithosphere of the Earth, split apart from one another during the geologic process of seafloor spreading. At divergent plate borders, seafloor spreading takes place. The mantle's convection currents generate heat that makes the crust more flexible and less thick when tectonic plates slowly drift apart from one another. Less dense material rises, frequently creating mountains or elevated seafloor regions. The crust eventually breaks. In order to fill these fissures, hot magma heated by mantle convection rises up and spills onto the crust.
To know more about Seafloor spreading refer:
https://brainly.com/question/17914057
#SPJ4
