Scientists have measured the rate of growth of the Atlantic Ocean basin to be about 2 to 3 cm per year. This type of activity coincides with the formation of ridges on the ocean floor. What is the most likely cause of this activity?

Pick the answer from these options

Select from:
[1]. erosion from tidal action;
[2]. the deposition of sediment;
[3]. the flow of continental basalt;
[4]. movement from tectonic plates;
[4].