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Answer: (3) both (1) and (2)
Fluids are both gases and liquids.
Explanation
Because they could be made to move or flow, liquids and gases are both referred to as fluids.
A substance that, when subjected to a force or stress, exhibits behaviours such as flow, deformation, and shape change. It does not have a predetermined shape, but rather confirms its surface to the form of the container it is contained in.
Although gases are also considered to be fluids, for the purposes of this discussion, we will focus on fluids that are predominantly incompressible.
Substances in the form of solutions, liquids, cytoplasm, cytosol, DNA and proteins in solution, micelles, membranes, colloids, gels, etc. Every one of these substances, to varying degrees, can be categorised as fluid.
