Answer: memo consists of two parts: the identifying information at the top, and the message itself. At the top, identify for whom the memo has been written, who is sending it, the subject, and the date. The subject line serves as the memo's title.
Explanation:
Under is the prepositional phrase. Remember prepositional phrases show location. Under ins the only word that does that. Good luck my man.
The topic sentence states this main idea.
Answer:
However
Explanation:
However will transition to a different point in a speech. The other options would reference sentence one.