The sensor would just the distance then set off an alarm, the installation expert explained it was called a what kind of sensor?\nOptions:\n- near\n- closeness\n- here\n- proximity\n- this
Let's think carefully first. Step-by-step reasoning process:
User
Proximity means nearness in space, time or relationship. The sensor would just the distance then set off an alarm, the installation expert explained it was called a proximity sensor. So the final answer is proximity.
Assistant