Deductive reasoning.
Deductive reasoning is a type of reasoning where a general fact is broken down into a more specific case to make an inference. This general fact can be a broad branch of knowledge then gets into its parts that may comprise this broad knowledge.
Probably through a electron microscope either TEM or SEM. or possibly a picture through the microscope. I hope that helped.
In the textbook its called a convergent boundary
Answer:
Pneumonia is an infection of the lungs caused by bacteria virus fungi or protozoa in rare condition.