What is the relationship between infection and microorganisms? microorganisms are caused by infections. 10 infections and microorganisms are the same thing. the invasion and multiplication of harmful microorganisms cause an infection. microorganisms can invade and multiply within the body, and make an infection disappear.

Okay so first you have to know that infections are caused by microorganisms, which is actually one of the options. Therefore the answer is C.

Hope this helped!

answer; i believe that the correct answer is (light);

genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).