I think its <u>B</u> because it looks like it might indicate a future rain storm.
Answer:
1. the difference between a series circuit and parallel are if a bulb goes out in a series circuit all go out and in a parallel if one goes out all the others stay on.
2. the function of a switch is to determine if the circuit is closed or open and how is stays on.
Explanation:
They are poor conductors because they keep the heat trapped in one spot, while other materials like metal let the heat go through itself.