Final answer:
Overseers supervised the care for enslaved people on plantations, ensuring that they met the expected daily amount of work.
Step-by-step explanation:
The care for enslaved people on plantations was primarily supervised by overseers. Overseers were hired by plantation owners to manage the enslaved laborers and ensure that they met the expected daily amount of work. They had the authority to measure the yield of each enslaved individual and sometimes resorted to whipping those who picked less than expected. Although plantation owners and mistresses had a role in the organization and management of the plantation, the direct supervision of enslaved people was done by overseers.