An electron microscope uses a beam of electrons in order to see very small and detailed components. These electrons are in fact negatively charged particles.
This type of microscope would allow you to see small components such as ribosomes and other organelles inside a cell.
Therefore, your answer is B. Electron Microscope.
Well you haven't provided any answer options so answer options include things like mountain climbing. Mountain climbing involves multiple systems and functions over a long period, with moderate being something like hiking the same mountain.
Flat good luck wooooooooo