Which detail in this excerpt helps create the pace and mood?
Read the following excerpt from The Jungle Book by
Rudyard Kipling
There he checked, for he heard the yell of the Pack
hunting, heard the bellow of a hunted Sambhur, and the
snort as the buck turned at bay. Then there were
wicked, bitter howls from the young wolves: "Akela!
Akela! Let the Lone Wolf show his strength. Room for
the leader of our Pack! Spring, Akela!"
"he checked
turned at bay
leader of our Pack!"
Spring, Akela!"

i dont understand the question you are asking

in the following paragraph, the fourth sentence the correct answer is: three personal subject pronouns

”she was embarrassed when she found that they had been put back on the shelves…”

a   subject pronoun is a personal pronoun. i, you, he, she it, we, they.  

in the sentence it can be observed she, used twice and they used once. is for this reason that is a three personal subject pronoun sentence.

greywater is gently used water from your bathroom sinks, showers, tubs, and washing machines. it is not water that has come into contact with feces, either from the toilet or from washing diapers. greywater may contain traces of dirt, food, grease, hair, and certain household cleaning products.