Question

what part of a compound microscope do you put your eye up to to see the stage?
arm
base
objective lens
eyepiece (ocular lens)

Explanation:

The eyepiece (ocular lens) is the part of a compound microscope that you put your eye up to see the stage. It magnifies the image formed by the objective lens. The arm is for carrying the microscope, the base provides support, and the objective lens is near the specimen, not where you put your eye.

Answer:

Eyepiece (Ocular Lens)