Asap. what is an example of a physical change? having less ash than the paper that was burned to form it.
ice forming and then melting back into water.
rust having a different identity than the iron it forms on.
the irreversible reaction of vinegar and baking soda.

The answer is a) taiga because taigas are cold

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