Question

is it possible for a skin diver to dive to any depth as long as his snorkel tube is sufficiently long? note: a snorkel is a face mask with a breathing tube that sticks above the surface of the water. multiple choice
no. although increasing depth doesnt affect the pressure changes in his/her lungs, things can barely be seen in the water.
no. the diver will still be limited by breath-holding time but can manage the pressure difference.
yes, a long enough snorkel will allow the diver to breathe surface air at any depth.
no, the diver will still be limited by breath-holding time and drastic pressure changes.

Explanation:

As depth increases, water pressure rises, causing drastic pressure changes in the diver's lungs (making breathing hard) and the diver can only hold breath for a limited time. So a long snorkel doesn't overcome these limits.

Answer:

D. No, the diver will still be limited by breath - holding time and drastic pressure changes.