In “the rockpile” by james baldwin, how does the way the children play on the rockpile contribute to the rockpile’s symbolism?

their violent play makes the rockpile a place of danger.
their use of violence makes the rockpile a place of fear.
their gang fights make the rockpile a place for insiders.
their fighting makes the rockpile a place of intolerance.

the gas pressure p, gas volume v, and gas temperature t are given in the formula:   pv=nrt,

r is the gas constant, and n is the number of gas moles.

if the container is cooled and remains under atmospheric pressure, where r is a constant that does not change, the volume of the container remains the same, the conclusion is drawn that, with all other values ​​unchanged, the number of gas moles n, is decreases.

the right answer is a.