Question
What is the process by which oceans form over millions of years?
A: plate collision
B: erosion
C: mountain formation
D: sea-floor spreading
A: plate collision
B: erosion
C: mountain formation
D: sea-floor spreading
Answers
GPT-4o mini
The correct answer is **D: sea-floor spreading**. This process occurs at mid-ocean ridges where tectonic plates move apart, allowing magma to rise and create new oceanic crust. Over millions of years, this process contributes to the formation and expansion of oceans.