(a) If you did the solar water heater option, discuss which cup (i. e., black paper, white paper or control) was the hottest and which was the coolest. Why?
(b) If you did the solar panel option, discuss what happened when your solar panel was shaded by aluminum foil. Would your panel work at night? Why or why not?

Global warming was a major concern some people do not care global warming is fake it is not real the percentage of it happening  is slight 

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