Final answer:
To observe a wet mount slide, a Microscope is the proper equipment, particularly a compound microscope with multiple lenses for detailed inspection. For examining thick structures such as biofilms, a confocal scanning laser microscope is highly suitable.
Step-by-step explanation:
To view a 1 point wet mount slide, the appropriate piece of optical equipment would be a Microscope. A microscope is an instrument that magnifies an object, using a beam of visible light passed and bent through a lens system to visualize a specimen, including bacteria, fungi, and other single-celled organisms that are otherwise too small to see. The compound microscope, with its multiple lenses, allows for high magnification and detailed observation of such microscopic specimens.
Regarding the type of microscope especially useful for viewing thick structures such as biofilms, a confocal scanning laser microscope (d) would be ideal. This type of microscope can scan specimens with a laser and capture sharp images at various depths, providing a clear view of complex structures like biofilms.