What is the cavity between the yolk and the blastoderm in a chick egg?

no

In a scenario where you believe in evolution, the egg must have come first. Because in order for a chicken to even come into existence something must have produced that egg. Therefore, a chicken like...

The embryo consumes the yolk, and cells turn it into more of the chick enabling it to grow.

Yolk is good food containing much of what a chick needs, it is after all what the chick grew from inside the egg.

Both are eggs that can be used for food but what you refer to as a "food egg" is an unfertilized egg. These are the eggs you find at most grocery stores. The chickens who lay these eggs do not ever...