Answer:
Antonie van Leeuwenhoek.
Explanation:
Microscope is used to study the objects that are not visible by the naked eyes. The microscope can magnify the object according to the observer and is helpful to study cellular organization.
The first microscope was discovered by the scientist known as Antonie van Leeuwenhoek. He used microscope to see the animalcules or microscopic animal. The Antonie van Leeuwenhoek was also known as the father of microbiology.
Thus, the answer is Antonie van Leeuwenhoek.