What theory explains the formation and movement of the outer surface of the earth?

Hey, Name's Jessy. I hope, I answer your question.

The theory is of the plate tectonics postulates that the earth's crust is main of large plates of crust that move across the surface of the earth. The outermost portion of the earth, the lithosphere is broken into multiple plates that move very slowly in relation to one another.

Ohm's law tells you that i = v/r where v is equivalent voltage and r is equivalent resistance of the circuit
since all circuits have the same voltage, your question is really asking which circuit has the lowest total resistance, since the lower the resistance, the higher the current
circuit a has a resistance of 5 ohms; circuit c is in series so has a resistance of 10 ohms; circuit b is in parallel and therefore has a resistance of 2.5 ohms (review your notes on adding resistances in parallel and series); therefore b has the highest current

Answerit decreases;