Hi can someone please answer the number 2 question i really need it thank you ❤️

s"x ch"at with me insta id 123bhi__

the part of the wave he is travelling on is the crest

the earths atmosphere is made up of nitrogen and oxygen. solids can turn into gasses through a process called sublimation. sublimation is the transition of a substance directly from the solid to the gas phase, without passing through the intermediate liquid phase.

hope this : d