Robert Hooke used a microscope to observe tiny spaces in dead cork bark. What did his observations lead to the discovery of?

A.cell organelles
B.cell division
C.plant cells
D.Bacterial cells

The answer is the option c. fact. Indeed facts are the events such as they occur, without interpretations or opinions. Facts happens and they can be observed by different means: you can get them through sense organs (eye, ear, mouth, skin, nose) or with instruments. When you report facts you must clearly state them appart of your interpretation or opinion.