What is the alvin primarily used for ?

For Dave to scream A

Alvin, which is operated by Woods Hole Oceanographic Institution (WHOI), has been in operation since 1964. ... Alvin was the first deep-sea submersible capable of carrying passengers, usually a pilot and two observers. Its first untethered dive measured 35 ft.

i believe you meant to say air rather than hair so the answer is below ")

the dead sea, the lowest place on earth at 430 metres (1,410 ft) below sea level, has a correspondingly high typical atmospheric pressure of 1065 hpa.

what is shown in the image?

eukaryote

chloroplast

mitochondrion

submitted