Which expression represents the height of the pyramid?

StartFraction 3 V Over y squared EndFraction units
(3 V minus y squared) units
(V minus 3 y squared) units
StartFraction V Over 3 y squared EndFraction units

the photo and full question are both in attachments. mark as brainliest. i need 4 more brainliest to advance in rank.

water: cools down faster, heats up faster, idk the last one

land: cools down slower, heats up slower, idk the last one

edit: if anything i answer is incorrect, i'm sorry. double check my work with someone else before using it. you for understanding.