Define normal microbiota and explain their significance to human health. Address the following points (4 points):

Definition – What are normal microbiota, and where are they commonly found in the human body?

Example – Provide one example of a normal microbial species and the body site it inhabits.

Factors influencing composition – Identify at least 3 factors that affect the composition of the normal microbiota 

Health role – Describe 2 beneficial functions of normal microbiota in maintaining human health