compares the physical and human characteristics of different places
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clinically, some people often have repeated allergies, eczema and respiratory infections or other parts of the infection, in this case, in addition to some routine tests such as tests for white blood cells, immunoglobulin series, lymphocyte subsets, etc., the five immune immunoglobulin tests are also necessary.

i believe the answer is c

i need an image of the diagram

thinking it would be physical characteristics