Answer:
Your answer will be (a) polder.
The theory of plate tectonics states that the Earth's solid outer crust, the lithosphere, is separated into plates that move over the asthenosphere, the molten upper portion of the mantle. Oceanic and continental plates come together, spread apart, and interact at boundaries all over the planet.
<span>As water in the oceans cools down, it tends to Sink
b)Sink
Because when water becomes warm due to the heat of the sun it floats to the surface of the ocean and cool water is in the bottom</span>
