Which sentence should be revised to improve this paragraphs sentence fluency

Which paragraph lol

this is not a question its simply asking you to read and write a few sentences and   the question on the bottom its fairly easy, you can do this!

aug 15, 2012 - although van leeuwenhoek was not the inventor of the microscope, he advanced it more he loved to grind and focus a new lens in order to see the unseen world. most of leeuwenhoek's microscopes were silver. in a simple but significant experiment (1668), he demonstrated that worms found on