Final answer:
Enslaved people on the Middle Passage endured poor ventilation on the ships.
Step-by-step explanation:
A characteristic of the Middle Passage for enslaved people was being on a ship that provided no fresh air. Enslaved people were crowded into the ships' holds, which were cramped, poorly ventilated, and unsanitary. This lack of fresh air contributed to the spread of diseases and increased the suffering of the enslaved people.
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