How to kill a human?.

breathe deeply from your lower lungs - imagine a rubber ring around your waist (your diaphragm)

breathe in and try to push the ring outwards.

breathe in through your nose and out through your nose and mouth.

explanation:

what are the options that have to match them to?

ground wouldnt be clean and the soap wouldnt be dirty

answer; /// i believe its the cochlea;