How did Robert Hooke share what he observed through his microscope?

When he looked at a thin slice of cork under his microscope, he was surprised to see what looked like a honeycomb. Hooke made the drawing in figure below to show what he saw. As you can see, the cork was made up of many tiny units, which Hooke called cells. Cork Cells

i think it would be b. tissue because an organ system is a group of organs that work together to perform one or more functions. each does a particular job in the body, and is made up of certain tissues.