Solve the riddle please I’ll give the brainliest for whoever solves it

my first is in hogwarts, but not in gryffindor, my second starts elrond, but it's not in valinor. from there it should be easy, to wit, youre almost done, i start with a pronoun, but i also end with one

the rigid outer part of the earth, consisting of the crust and upper mantle is the lithosphere.     answer   crust and outer part of the mantle.

a. conversing outside

explanation:

conversing outside is an example of a communication style.

i hope this you, and have a wonderful day!

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.