Which are the physical (p), chemical (c), and biological (b) immune responses?

a.) p: complement system; c: saliva; b: coughing
b.) p: coughing; c: saliva; b: complement system
c.) p: coughing; c: sneezing; b: complement system
d.) p: complement system; c: saliva; b: sneezing

The correct answer is option(b)

Coughing is defined as a kind of physical response because the secreted mucous helps in the removal of pollutants and pathogens from the throat and lungs.

Saliva is a chemical response because it includes various types enzymes that act as antibacterial material when it comes to pathogen attack.

Complement System is a biological response because it evokes response which results in production of antibodies to kill pathogens from the body.

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the answer is third world countries, take for instance china, they restricted each family with only one child,

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