First answergets brainliest :

how did most people in the north earn a living?

a) manufacturing
b) agriculture
c) service industry
d) financial industry

Awaiver of the requirement for documentation of informed consent may be granted when: the investigator has no convenient place to store signed consent forms separate from the research datathe only record linking the subject and the research is the consent document and the principal risk is a breach of confidentiality.potential subjects might find some of the research questions embarrassing, personal, or intrusivethe subjects are literate in their own language; however, they do not read, write, or speak english

Name that largest artificial lake built in the 11th century

Describe the relationship between population growth consumption and the environment.