PLEASE HELP ASAP!! Select the paragraph that effectively combines relevant details; precise, domain-specific vocabulary; clear transitions; and formal style.

A.
Killer whales are listed as endangered species in some regions but not on a global level. This is because they travel in such tight-knit families, which means their ability to thrive and survive is directly related to where they live.
B.
Killer whales travel in pods that are matriarchal in nature and even more close-knit than human families. Female killer whales begin producing offspring at the age of fifteen but mate outside of their own families to avoid domestic squabbles.
C.
Killer whales are extremely social mammals that use sophisticated verbal hunting techniques. Using clicks, whistles, and pulse calls, killer whales hunt approximately thirty species of fish and consume, on average, five hundred pounds of food each day.
D.
The killer whale is one of thirty-five dolphin species. Killer whales are like other whales, but they are actually even more like dolphins. The way they communicate with one another is a lot like dolphins, too. Both animals use sound and body language to communicate.

What is the meaning of the word checking as it is used in this sentence from the second paragraph of the passage?

What is the main difference between hearing and listening? a) hearing is easy; listening is hard. b) hearing involves the outer ear; listening involves the inner ear. c) hearing is the physical activity; listening involves processing the information. d) none of the above

Hurry i am on the semester test which theme is evident in this excerpt from robert frost's "mending wall"? but at spring mending-time we find them there. i let my neighbor know beyond the hill; and on a day we meet to walk the line and set the wall between us once again. we keep the wall between us as we go. to each the boulders that have fallen to each. and some are loaves and some so nearly balls we have to use a spell to make them balance: "stay where you are until our backs are turned! " we wear our fingers rough with handling them. oh, just another kind of out-door game, one on a side. it comes to little more: there where it is we do not need the wall: he is all pine and i am apple orchard. my apple trees will never get across and eat the cones under his pines, i tell him. he only says, “good fences make good neighbors." spring is the mischief in me, and i wonder if i could put a notion in his head: "why do they make good neighbors? isn't it where there are cows? but here there are no cows. before i built a wall i'd ask to know what i was walling in or walling out, and to whom i was like to give offence. . " a. the human desire for material gain b. the influence of financial constraints c. the positive effects of friendship d. the uncertain nature of human relations e. the futility of human yearning