Hi Emma!
Fallacy of division is where the assumption of the whole is applied to the parts. Kind of like over generalization. For example: The most popular sport in Brazil is soccer, Paolo is from Brazil, therefore Paolo's favorite sport is soccer. Or the US is a rich country, therefore everyone in the US must be rich.
Fallacy of composition is where you attribute the traits of the part and assume it to the whole. For example: If I leave earlier in the morning, I'll beat rush our traffic. Therefore, if everyone else leaves early in the morning, they'll also beat rush hour traffic.
Essentially they are the inverse of each other, one generalizes the individual other generalizes the whole.
