Answer:
Microbial
Explanation:
Microbial communities defend human body against pathogenic microbes which are responsible for disease prevalence. Some of the prime examples of diseases that are transferred through pathogenic microbes to their host are Salmonella, Dengue and E. coli etc. Hence, disrupting the microbial communities can make us more susceptible to diseases.
There are 13 stripes in the American Flag. Which represents the 13 states.
I believe the answer is: Stimulus enchancement
Stimulus enhancement refers to an exposure toward a certain stimulus that make the observer aware on the relationship between the stimulus and the result. In the scenario above, the new dog is the observer, buddy chasing the lgiht is the stimulus, and Zoe follow in chasing the red light is the result.