An outpatient surgery center, or a clinic that specializes in endoscopy. Possibly a digestive disease facility.
OK so basically you use a compound light microscope to observe specimen so if you were trying to find micro organisms that would be the one to choose.
You should tell him to use a different knife.
Answer: Manipulation of the Independent Variable
Again, to manipulate an independent variable means to change its level systematically so that different groups of participants are exposed to different levels of that variable, or the same group of participants is exposed to different levels at different times.
Explanation: hopes this helps and if u need any more help just let me know and i will help u.