If an object that enters the earth’s atmosphere does not completely disintegrate, its remains can impact the earth true or flase

True, when entering earths atmosphere there are stages. also known as the Thermosphere. stage 3. Where tempatures are hotter then any other stage. but do not burn all the way. mainly like a "shooting star".

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