[roger_smith]

Yes electricity will take the path with the least resistance. I'm not sure what a fuse is since I'm taking all my science courses in French, but Google is telling me a fuse is a resistor and therefor the lightbulbs function as the fuse (please correct me if I'm wrong). I'm just unsure if taking the bulb out and replacing it with copper would result in the battery being short circuited and making the battery melt, or if the circuit would function as per usual and just the other batteries (minus 1 and 2) would just stay out.

Every circuit should have a fuse. It protects from damage due to a short circuit or overdraw.

Your battery is unlikely to melt before the wiring burns up. It could still happen.

I believe if you put a copper wire in place of the bulb 7, bulbs 1 and 2 would light and glow brightly, and the remaining bulbs would not light at all.