How Do Animal Structures Well Suited To Specific Functions Come About How Do Animal Structures Well Suited To Specific Functions Come About?

How do animal structures well suited to specific functions come about? - how do animal structures well suited to specific functions come about

a. Natural selection favors the functional structure for a particular environment.
b. Mutations appear to the structures necessary for survival in a particular environment guaranteed.
c. An animal that needed a new role to develop a new structure that transitional period.
d. animals develop structural models to improve their functions.
e. animals to continuously improve their structures, improve their functions.