Sorry this isn’t an answer but do all schools take a star test?
Yellow lines means that roads are merging and there's going to be traffic coming, so it's a warning to be cautious and to join the merged road. It's usually a warning to people that are going at a high speed in their vehicle. So merging majorly helps prevent an accident.
Continental Drift was his theory
The continents were separating farther and farther from each other so he came up with the theory that were drifting away from each other but didn’t have proof of how
