What is one example of the use of an infrared sensor? A. water flows without turning on a faucet
B. monitor building entry and exit
C. track shipment of packages
D. bar code scanners keep up with inventory supplies

permafrost layer, it exists beneath a layer of soil, rock or sediment.

answer; rational if melanie values sleep more highly than the benefits she expects to receive from attending the class;

it makes your voice or whatever you are doing with it and makes it louder. doing this makes people pay attention to you and makes them hear what you say therefore they have a better chance of following you or listening to you. therfore establishing dominance.