Why might ballast have
been important to the condition of goods
transported by ship?

Ships take on and discharge ballast water to compensate for changes in the mass of cargo carried. ... Many other species, referred to as fouling organisms, are transported when they attach to the hulls of ships. Both ballast and hull fouling are important vectors of freshwater, as well as marine, organisms.

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unknown. best bet to watch it is at kissanime (a lot of popups and has ads and has potential to be a virus not recommended) or crunchyroll (recommended but has ads and has no popups). you will have to wait. i really want netflix to give the other seasons.