Behavior that is initiated or changed in response to a request, as opposed to a command or direct order, is an example of

This type of behavior is compliance behavior. Compliance behavior is known to be a change on individual’s behavior because of another person’s request. A good example of this is when an individual changes their attitude in order to not be left out in the group. 

hydrogen is a compound or a single element and a element is a pure substence that cannot be separated into simpler subtances

clorine is a compound its a chemical substance that forms when two or more different elements combine

so both hydrogen and clorine are compounds