According to figure 26–1, the development of three germ layers occurred after the development of
a. protostome development
b. vertebrates
c. deuterostome development
d. tissues

Protostome development

Explanation: The ectoderm defines the formation of outer layer of the body such as skin, hair, mammary gland et cetera. The inner tissues of the body takes place and called as the endoderm

after the formation of ectoderm and endoderm, the interaction of these two layers helps in the formation of mesoderm.

The mesoderm forms the skeleton muscle, bone and connective tissue. This differentiation of the three germ layers takes place after protostome development.

post-impressionism is a predominantly french art movement that developed roughly between 1886 and 1905, from the last impressionist exhibition to the birth of fauvism. post-impressionism emerged as a reaction against impressionists' concern for the naturalistic depiction of light and colour.

explanation:

if the type of the food available changes, then the frequency of beak types will change, because birds with beaks more suited to the available food will be more successful over time.