How much force will be exerted on a particle
with a charge of -8.7 x 10-9 C if it is placed in an
electric field with a strength of 2.6 N/C?

The answer to this is decibel

Sorry i don’t know what to do

Sublimation- which change of state is shown in model

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