<span>Im pretty sure the answer is B) Pupil, lens, retina, optic nerve
hope this helps :)</span>
C. Serving as a Shock absorber and cleaning agent
The answer is different magnification lenses. Leeuwenhoek use a microscope with different magnification lenses which enabled him to see bacteria. <span>His microscope was able to achieve 50-300x magnification, which enabled him to see a variety of bacteria.</span>
The most well known answer according to my bio teacher is nitrogen
