The highest level of organization for living things is the BIOSPHERE; it encompasses all other levels. The biological levels of organization of living things arranged from the simplest to most complex are: organelle, cells, tissues, organs, organ systems, organisms, populations, communities, ecosystem, and biosphere.
        
             
        
        
        
Biology is a branch of science that deals with living organisms and their vital processes.
Chemistry is the science that deals with the properties, composition, and structure of substances
Physics is the natural science that studies matter, its motion and behavior through space and time, and the related entities of energy and force
        
             
        
        
        
Answer:
It is the scientific method of investigation problem-solving used by disease detectives like epidemiologists, laboratory scientists, statisticians, physicians and other health care providers, and public health professionals, to get to the root of health problems and outbreaks in a community.
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