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Which is an example of a closed loop that best models a circuit?
A. a crowd dispersing in all directions
B. lightning striking a tree
C. students jogging around an oval track
D. a cross-country run from one point to another

B.lightning striking a tree

Explanation:

The crowd dispersing in all directions is not a closed-loop by any means, and students jogging around an oval track as well is not a closed-loop, and also not a cross country run from one point to another. However, the lightning striking a tree is a closed loop that best models a circuit. And as lightning strikes the tree, like a closed circuit, tree catches the fire, or in circuitry words, the current is generated, and tree catches the fire due to it, just like bulb starts glowing.

the answer is b) 2nd

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