Which scenario best shows how understanding physical properties of substances can be beneficial in
everyday life?
a person stirs a pan of sautéed vegetables with a spoon.
a person uses ammonia instead of water to dissolve the grime on a glass
surface.
a person makes salad dressing with olive oil instead of coconut oil.
a person uses a paste of baking soda and water to remove a stain from
clothing.

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

It is either a  proton or a neutron im almost positive. hope this .