A car is traveling along a flat, straight highway with a speed of' 25 meters per second. If the car's engine provides a forward
force of 2,250 Newtons, calculate the force of friction acting on
the car. (F = ma)

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

Answer mechanical energy;

It is the areas with lines. this may sound a little confusing, but i hope it !