Its mostly a stylistic choice although at one points it was mostly a heat related idea. Hot air rises so having a steep roof allowed for the accumulation of hot air. It was also a good windbreaker so a collection of houses were able to stop a lot of the harsh wind from damaging things.
It had many ports that allowed it to import and export
i believe the answer is: Fuel filter
Fuel filter is a part of your vehicles that screens out various form of small particles from the fuel (such as dirts). Every 15,000 miles, there would be a chance that your fuel filter is clogged. If this fuel filter is not changed, it would be hard for you to start your car.
<span>Led to the transatlantic slave trade</span>
