They have an effect because the bigger the school the more activities you can do because you have more people.
Located on the lateral side of the proximal humerus is an expanded bony area called the greater tubercle.
I believe the answer is: mats
by removing dirt, debris, and liquid from shoes, it will create a friction force that would prevent you from falling. In order to achieve this, mats usually made from materials that could not absorb liqiuid, such as vinyl, polypropylene, or nitrile rubber.