Describe each plate boundary – transform, convergent, divergent. how do the plates move at each of these, what happens, and what features form (i. e. – trench, volcanic island, volcano on continent, mountain range, earthquake, rift valley, subduction).

Transform: The plates slide past each other, one going forwards, the other going back, kind of grinding each other. A Transform Boundary is also a fault, so it causes Earthquakes mostly.
Convergent: When two plates collide with each other. They form subduction mostly and trenches. They can also create volcanoes or volcanic islands.
Divergent: When two boundaries move away from each other. They form rift valleys, mountain ranges

A,) cause a & b are equal & both gives 180°

Idon't know. the question you are trying to ask doesn't make sense.