Questions 3 and 4 refer to the following diagram. Tertiary Consumer Snake Secondary d Consumer Toad eigsfarty Word bo Primary Stad oring Consumers Insect bl TO CAB to Reap feom Primary Producer Green Plants il mon Decomposer Bacteria 3. The illustration proves the well-known fact that which of the following forms the largest group in the animal world? A. amphibians B. insects C. mammals D. birds E. reptiles 4. How would the South American boa constrictor, which eats amphibians, be categorized in this ecosystem? A. decomposer B. primary producer C. primary consumer D. secondary consumer E. tertiary consumer

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Environmental health and hazards

An organism's environment is the environment in which it lives and has an impact on its well-being. The World Health Organization (WHO) defines environmental health as "those aspects of public health, such as quality of life, that are influenced by physical, chemical, biological, social, and psychosocial components in the environment." Environmental health is concerned with both natural and man-made settings in order to enhance public health. Environmental science, occupational medicine, toxicology, and epidemiology are the key subdisciplines of environmental health.