Answer:
1. Like humans, animals need shelter, food, a way to get around, and protection from things that cause them harm. ... Special features that help animals survive are called physical adaptations. Behaviors that help animals survive are called behavioral adaptations. Most animals develop adaptations over long periods of time.
2. A body plan is a group of structural and developmental characteristics that can be used to identify a group of animals, such as a phylum. ... Embryonic development is relatively consistent among animals with similar body plans, although similar larval forms may give rise to very different adults in some groups.
3.All members of a particular group share the same body plan at some point during their development—in the embryonic, larval, or adult stage. ... Similarities and differences in adult shape and form, as well as the developmental pattern of embryos, provide the framework for modern taxonomic classification
