Light wands are small tubes that can be used to give off light without electricity or fire. a light wand keeps two fluids separate from each other until the wand is bent. once the wand is bent, the tube holding the inner fluid breaks, and the two fluids mix together inside the wand.

Some type of thing that was invisible

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