What is the term for variations in a language, mainly in grammar and semantics?

Diana is asked to scan the local newspaper to see if she can spot any client or product mentions. What is this practice called?

a) Measurement of message exposure b) Measurement of attitude c) Measurement of publicity reach d) Measurement of awareness

Which is an example of communicating emotionally?

a. crying while expressing sadness b. nervousness that leads to stuttering c. describing a happy memory d. excitement about an upcoming date