Answer:
The correct answer will be options-
1. Microscopes made it possible to view cells.
2. The understanding that both plants and animals were made of cells was a breakthrough.
3. Science discarded the idea that the basic structural unit of animals was the fiber.
Step-by-step explanation:
The microscope is an instrument which helped in understanding the life of microscopic matter which could be living or non-living.
The basic unit of life called cell was discovered after the invention of the microscope by Robert Hooke who observed the dead cells of plant in 1665. The living cell was observed by the Anton Van Leeuwenhoek in 1674.
The advancement in the microscope allowed the humans to look at the cells in-depth as the nucleus and other organelles were discovered. The advancement leads to the generation of cell theory which stated that all living organisms whether plants or animals are composed of cells.
Thus, the selected options are the correct answer.