A convex mirror is used to look under a vehicle during security check because it provides a wider field of view and the images formed are virtual but smaller and upright. The correct option among all the options that are given in the question is the third option or option "C". I hope it helps you.
Carbon dioxide and oxygen cannot pass through but move in and out
c<span>: The interdependence of body systems is essential because all systems work together to maintain homeostasis.</span>