Answer:
The seafloor is only 180 million years old due to the process of subduction. The floor of the sea's tends to get colder and denser with the passage of time. At a certain time, the seafloor becomes so dense that it sinks in the upper mantle. The Earth's crust cannot undergo this process and hence has oldest rocks. We can say that the seafloor is less than 180 million years old because it is typically recycled back into the mantle of the Earth.
the answer is D. Air will move from an area with higher pressure to an area with lower pressure :)
I believe the correct answer for the first blank would be: Does not require sunlight.
I hope my answer helped you! c:
