A. seafloor spreading at mid-ocean ridges
Answer:
They are forced to grow cash crops.
Explanation:
In the planet Earth , there are movement like the plate tectonics , which makes the surface of earth crust to move continuously , which is capable to generate lines of individual islands and volcanoes .
But these type of tectonic movements are not possible in Venus or Mars .
Thereby making the surface of earth different from that of planet Mars and Venus .
B. Movement, sometimes you can you quizlet to try find some answers
