1. What is one irreversible effect of both deforestation and water pollution on the environment? a. Extinction of species
b. Thinking of the ozone shield
c. Depletion of atmospheric carbon dioxide levels
d. Increase in no renewable resources
(I will be picking a random topic)

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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

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