Concept:Some organisms consist of a single cell that carries out all life processes. Their level of organization is therefore just the cell level.Explanation:The illustration shows a unicellular organism, such as Amoeba. Its entire body is made up of one cell only. This single cell performs all the activities needed for life, including movement, feeding, and reproduction. Because the organism is not made of many cells grouped into tissues or organs, it does not reach a tissue, organ, or system level of organization. Hence, the level of organization shown here is the cell.Answer:B. cell
