human
Question: 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?

Choices:
A) erosion from tidal action
B) the deposition of sediment
C) the flow of continental basalt
D) movement from tectonic plates
gpt
The correct answer is 3: movement from tectonic plates.