Which of the following does a developing embryo depend on to survive

The embryo in mammals depend on the umbilical cord to survive, while amphibian embryos depend on the placenta and the protection of the shell of the egg. These two materials perform the same functions of providing the embryo with the necessary nutrients it needs to grow into a mature organism.

Through the umbilical cord, the embryo receives nutrients that are ingested or taken in by the mother. While the egg absorbs its nutrients from the encapsulated placenta inside its walls, where water and most nutrients are found.

I’ve personally felt invisible all my life, especially when a friend turned out to be fake and didn’t seem to take any type of interest in what i said or any type of input i said. being invisible is a terrifying feeling to experience due to the fact you feel like no one sees you and just sees you (sorry if that doesn’t make sense). it’s like a deep emptiness that no one can fill, just you; you have to fix that emptiness by yourself and you don’t really want , or in some cases want to be invisible. i can see many invisible people when they intentionally stay away from people that can potentially hurt them in any way. also, when a person intentionally breaks off a connection so they aren’t seen by people.hope it

The correct answer is c