"And departing leave behind us footprints on the sands of time. The meaning of this line from "Psalm of Life' may be campared to which
line from another poem studied?

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

c is the answer. hope this