In what types of living things must groups of cells work together? a multicellular life b viruses c unicellular life d bacteria

Answer: A. Multicellular life

Explanation: Multicellular organisms are compund by many cells and different type of cells. In such organisms, cells must work together for the survival of the organism. That cooperative work includes regulation of cell division and cell death, division of tasks and cell fates, for example, cells for the immune response, those for metabolism in the liver or neurons for neurotransmision, and nutrient transport.