Question

which area of the body seems to have the highest concentration of beneficial microbes

Answer 1

the stomach has the highest concentration of microbes in our body.
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Answer 2

“Human gut” called as gastrointestinal tract, incorporating the mouth, throat, stomach, and digestive organs is home to trillions of microorganisms, including microbes and single-cell living beings called archaea.  

Explanation:

These organisms play out an assortment of capacities that are fundamental to well being, for example, keeping up the internal coating of the digestive organs, giving supplements, for example, nutrients, and ensuring against pathogens.  

They additionally assume a key job in the best possible working of the insusceptible framework. A disturbance to be determined of these microscopic organisms can result in a wide scope of medical issues, including sensitivities, bad-tempered entrails ailment, and ulcers.