The situation: we see each other five days a week but we never talk. like two diligent ants committed to our dull, programmed pre-conscious tasks we routinely park almost next to each other in the same featureless cul-de-sac when we drop our kids off at the elementary school. but, for all this, we work circumspectly but systematically to remain strangers. in the morning freshness, eye contact is scrupulously avoided and no bracing or cheery words, nor even manly nods, ever get exchanged. truly, we practice the indifference of robots. he walks by me as if, were you to stop him and unscrew the covering on one of his plastic eyeballs, you would uncover a large photosensitive cell and a few wires. and if you were to unscrew me?

correct answer is option a.

tropopause, stratopause and mesopause have all in common aspect that is point of maximum temperature in its layer of the atmosphere. all layers of atmosphere observe abrupt change in temperature. tropopause is the boundary between troposphere and stratosphere. stratopause is the boundary between stratosphere and mesosphere. mesopause is the boundary between mesosphere and thermosphere. these all boundaries are ranges between altitude of 0 to 80 km.

a. by using fur or clothes to trap heat energy near the body

all matter is made up of atoms

in any element all atoms are the same

elements in a compound are always in a constant ratio: apex

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.