Infectious diseases are caused by microorganisms that enter your body, through a contaminated source, which can be food, water, a person, air, etc.
These microorganisms can be either bacteria, fungi, viruses, etc.
Hope it helped,
BioTeacher101
C) His work proving that unseen bacteria can cause disease.
The volume decreases (smaller, less)
Answer:
There is no any unbalanced equation
I think it’s A. Excreting waste
