Question

give reason
for - one must wash one's hand before eating

Answer 1

Keeping hands clean through improved hand hygiene is one of the most important steps we can take to avoid getting sick and spreading germs to others. Many diseases and conditions are spread by not washing hands with soap and clean, running water.

Answer 2

One must wash one's hands before eating so as to clean his hands so that the dirt or the germ does not go along with our food. It is done to maintain a hygiene.