{"Bacteria": {"Water availability": 9, "Atmospheric pressure": 6, "Temperature": 8, "Radiation": 4}, "Algae": {"Water availability": 6, "Atmospheric pressure": 4, "Temperature": 5, "Radiation": 3}, "Fungi": {"Water availability": 5, "Atmospheric pressure": 4, "Temperature": 6, "Radiation": 2}, "Plants": {"Water availability": 8, "Atmospheric pressure": 7, "Temperature": 7, "Radiation": 5}, "Animals": {"Water availability": 7, "Atmospheric pressure": 6, "Temperature": 5, "Radiation": 1}} The chance of living on Mars is rated on a scale of 1-10, with a higher rating indicating a greater chance of survival. The four factors considered are water availability, atmospheric pressure, temperature, and radiation. The higher the rating, the more adaptable the given species is considered to be in the Martian environment. In this dictionary, each species is represented by a key, and its corresponding nested dictionary contains the likelihood of its survival based on the four factors.