It survives by under water volcanoes like the marianas trench. :)
Explanation:
I'll try to help what is the question
In humans, the yolk sac is the
site of origin for blood cells and primordial germ cells. The human yolk sac is
a membrane located outside the embryo and it is connected by a tube through the
umbilical opening to the embryo's midgut. The yolk sac serves as an early site
for the formation of blood and in time, is incorporated into the primitive gut
of the embryo.
A is the answer I would choose :) amos 12kvng
Lower then your diaphragm around your liver
