The correct answer is: Eubacteria.
The human microbiota is the name for all of the bacteria found within the human body. This aggregates of microorganisms are wide spread in different tissues, such as the skin, mammary glands, seminal fluid, uterus, saliva, oral mucosa, conjunctiva, gastrointestinal tracts.
Diffusion , the movement of gas molecules .
It started to mold what is now the grand canyons.
