Answer:
Option C. Water
Step-by-step explanation:
The growth medium is used to promote the growth of microorganisms. The medium can be liquid, solid or semi-solid. There are various types of growth media like culture media, transport media, selective media, differential media and minimal media. The culture media do not contain selective element in the media for growth of cell.
The undefined media contains salts, water, nutrients and carbon source. The defined media contains known elements and no plant, yeast or animal tissue. The culture media provides water to the growing cell. Thus, Option C (water) is correct.