Which process in the water cycle is represented by arrow x, where water flows over land to the ocean?

if your own plato the answer is b. the fern transitioned from sporophyte generation to gametophyte generation.

hydrogen is a compound or a single element and a element is a pure substence that cannot be separated into simpler subtances

clorine is a compound its a chemical substance that forms when two or more different elements combine

so both hydrogen and clorine are compounds