Qué estructuras protegen y nutren al feto​

How does the author's purpose in this passage differ from an author writing about her personal struggle living with asthma?

The earth consists of a variety of different organisms. despite their diversity, however, some similarities on the structural and metabolic levels may be seen. these similarities can be attributed to a. similarities among organisms in their proteins and nucleic acids. b. the ability of organisms to readily adapt to sudden environmental changes. c. similarities in organisms' habitats and niches. d. the ability of all organisms to interbreed and produce new species.

Plz ! ive been stuck on this forever