Which link in the chain of infection does the situation portrays: daria borrows her teammate's shaving razor, which has staphylococcus bacteria on it. she accidentally cuts herself while shaving, and the bacteria enters the cut.

It is very important to stay hydrated. your body needs it for may things for cells, tissues, your organs and etc. water also with your temperature that way you don’t get a headache etc. i bet if you look it up there will be a lot of things you can learn.