Convergent, divergent and transform plate boundaries.
sex more . ---- . ---- . ---- sex. ---- . ---- . ---- . ---- . ---- . ---- . ---- . ---- . ---- . ---- nd even more sex. sex more...
divergent <--- --->(plates move away from each other), convergent ---> <---(plates move toward each other), and tronsform(two plates move past each other in opposite directions)
divergent,convergent, and transform boundaries
it is a mystery boundary