What is the job in egg?

It seems like you might be asking about the yolk of an egg!

The yolk is the round, yellow part of an egg. It's a powerhouse of nutrients, containing:

* Protein: Essential for building and repairing tissues.

* Fat: Provides energy and helps absorb vitamins.

* Vitamins: Like A, D, E, and K, important for various bodily functions.

* Minerals: Like iron, calcium, and zinc, necessary for growth and development.

So, the "job" of the yolk is to provide nourishment to the developing chick (if the egg is fertilized) or serve as a nutritious food source for humans.