identify the three domains of development,

describe why it is important to consider each domain in the study of adult development,
provide an example of how one domain of development impacts the other two.

2 answers

http://www.jiskha.com/search/index.cgi?query=study+of+adult+development
Skip the first two links and read the rest.
http://www.jiskha.com/search/index.cgi?query=three+domains+adult+development

Also read widely and carefully among these search results:
http://www.google.com/search?rlz=1C1GGGE_enUS379US379&sourceid=chrome&ie=UTF-8&q=three+domains+adult+development