. 28. In addition to his fame as an artist, Leonardo da Vinci is also famous as a scientist. Which BEST describes a scientific achievement for which Leonardo is famous?
discovery of basic principles of flight resulting in sketches of parachutes and gliders
discovery of single-celled organisms including germs that cause smallpox and bubonic plague
discovery of basic principles of optics resulting in the first lenses for simple telescopes and microscopes
discovery of basic principles of electricity including the fact that lightning is a form of static electricity