Acompound microscope uses question 7 options: a mirror that flips up to let light through the lens. a mirror to reflect an image of a small object. two convex lenses to magnify a small object. a convex mirror and a lens to enlarge an image.

A compound microscope uses TWO CONVEX LENSES TO MAGNIFY A SMALL OBJECT.
A compound microscope is an optical instrument for forming magnified image of small objects. The eyepieces of a compound microscope is made up of two planoconvex lenses that have a circular diaphragm between them. These two convex lenses magnify the image of a small object 1000 times when one is using a compound microscope.