Why is there less gas and dust in an elliptical galaxy?

Which statement describes john tuzo wilson’s contribution to the theory of plate tectonics? he proposed that plates carry parts of the seafloor. he theorized that pieces of earth move for a limited time. he suggested that the asthenosphere is broken into segments. he observed seafloor cracks similar to existing cracks in the continents.

Democratic vs democratic whats the difference? ?

Which two nations are doing the most to combat their environmental issues?