Which process happens last? a. gastrulation b. implantation c. fertilization d. ovulation e. blastulation

hmm ... so what i did was look up all of the meanings Gastrulation is a phase early in the embryonic development of most animals, during which the single-layered blastula is reorganized into a trilaminar ("three-layered") structure known as the gastrula. These three germ layers are known as the ectoderm, mesoderm, and endoderm. and so on would you say it is implantation?