Respuesta :
The outer-to-inner sequence of tissue layers in a post-gastrulation vertebrate embryo is option(c)i.e, Ectoderm - mesoderm - endoderm.
An embryo's germ layer is a collection of cells. As the embryo grows, these layers interact with one another and eventually give rise to all of the organs and tissues of the body. Almost every animal develops two or three germ layers at first. Through the process of gastrulation, the germ layers develop in the early stages of embryonic development.
A hollow cluster of cells known as a blastula reorganizes into two basic germ layers during gastrulation: an inner layer known as endoderm and an exterior layer known as ectoderm. The interaction of the endoderm and ectoderm results in the formation of the mesoderm, a third germ layer, in all animals with the exception of members of the phylum Cnidaria.
Learn more about gastrulation here:
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