Which of the following is a traditional human use of microorganisms?

Question

Quizplus · Accepted Answer

Baking bread is a traditional human use of microorganisms, as yeasts are used to ferment the dough and produce carbon dioxide gas which causes the bread to rise.

Answer: C 
 Treating water and sewage is another traditional human use of microorganisms, as they can break down organic matter and remove pollutants in wastewater treatment plants.

Option B and D are not traditional uses of microorganisms. While they are modern applications, they have not been used traditionally by humans.

Which of the Following Is a Traditional Human Use of Microorganisms