They pull and the same ones push away
They have no nucleus which give them more surface area to absorb more oxygen.
They have a concave shape which also give it more surface area.
And I can’t think of a third reason I’m sorry
The answer is energy, energy gives you the strength to do work and/or cause change
Continental-volcanic is NOT a convergent boundary. The answer to your question is B. I hope this is the answer that you are looking for and it comes to your help.