People in your community are disposing of waste and improperly causing land and water pollution what is the best way you can advocate for a clean environment?

What is one way in which an active listener can confirm understanding of a message?

Control center is it involved in homeostasis

Investigator a has biological specimens that are coded and linked to identifiers of the source individuals. investigator a provides the specimens to investigator b but does not provide the individual identifiers. investigator b agrees not to re-identify the source individuals. is investigator b's research using the biospecimens human subjects research according to the definition of human subjects research in the federal regulations?