When developing a persuasive speech of any type, you should begin by a. identifying possible supporting materials b. choosing your wording carefully c. developing a thesis statement d. generating main ideas

the underline word is basically like a prepositional phrase.

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.