What strong workers needed to crush and grind food?

The strong workers needed to crush and grind food are molars. Molars are the back teeth in the mouth that are used for grinding and chewing food. They are the largest and strongest teeth in the mouth, and they have a flat surface with ridges called cusps that help to grind food down. Molars are important for breaking down food into smaller pieces so that it can be more easily digested and absorbed by the body.