If you're moving, the people here will forward your letters for you.\nOptions:\n- envelopes\n- post office\n- mailbox\n- mail box\n- front door
Let's think carefully first. Step-by-step reasoning process:
User
Post office is the public department or corporation responsible for postal services and in some countries telecommunications. If you're moving, the people here at post office will forward your letters for you. So the final answer is post office.
Assistant