Here's why:

* Cells are tiny: Most cells are microscopic, meaning they're too small to be seen with the naked eye.

* Light microscopes use light and lenses: They magnify the image of the cell, making it large enough to see.

* Resolution is key: Light microscopes have sufficient resolution to distinguish the basic structures within a cell, like the nucleus, cytoplasm, and sometimes even organelles.

While there are more powerful microscopes like electron microscopes that can show even finer details of a cell, a light microscope is the standard tool for observing the basic structures of a cell.