osmosis is the net movement of water across a selectively permeable membrane driven by a difference in solute concentrations on the two sides of the membrane
Ans.
TEM or transmission electron microscopy is a microscopy method, which uses an electrons' beam to enlarge image of a specimen. It provides two-dimensional images of internal structures or organelles of cells.
As TEM is used to study internal structures of cells, only dead specimens can be used for study. TEM provides high magnification than conventional light microscope.
Thus, the correct answer is 'option C). internal structures of a cell.'