Step 1: Understand the hierarchy levels in organizations.
In organizational hierarchies, the lower levels generally refer to the individuals directly involved in daily operations. These individuals typically carry out the tasks and functions defined by higher management.
Step 2: Evaluate the options.
- The Foreman and Supervisor hold positions at the lower level of the hierarchy, overseeing daily operations and workers on the ground.
Step 3: Conclude.
The correct answer is Foreman and Supervisor, as they comprise the lower level of the hierarchy.
Final Answer:
\[
\boxed{\text{Foreman and Supervisor}}
\]