Question

multiple - choice question
how do you change the objective lens?
by moving the stage clips.
by turning the nosepiece.
rewatch

Explanation:

Microscopes have a nosepiece that holds different objective lenses. Turning the nosepiece allows you to change to a different objective lens for varying magnifications. Moving stage clips is for securing the specimen on the stage, not for changing the objective lens.

Answer:

By turning the nosepiece.