This Is a Certified Answer

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
Eggs should be coated with wax or oil because they provide a protective coating thus blocking the minute pores on the egg and preventing it being affected by moisture and other factors.
  • Brainly User
It is a way to preserve them,as it doesn't allows any organic matter to come in touch!