Answer :
Final answer:
Antonie van Leeuwenhoek, a Dutch lens grinder, was one of the first people to observe and document microorganisms using a microscope that he made.
Explanation:
The person who was one of the first to observe microorganisms was a lens grinder named Antonie van Leeuwenhoek. He was a Dutch cloth merchant who developed a powerful lens to view microbes. In 1675, using a simple but powerful microscope he made himself, Leeuwenhoek was able to observe single-celled organisms, which he described as 'animalcules' or 'wee little beasties,' swimming in a drop of rain water. Interestingly, he made drawings of these microorganisms, which we now know he was looking at bacteria and protists.
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