Answer:
they could take in too much air and suffocate
Explanation:
Answer: I'm sorry but Is this a joke or?
Answer:
A.certification
When someone completes their degree or something they get a certification.
He was known for the "Allotey Formalism" which arose from his work on soft X-ray spectroscopy. He was the 1973 recipient of the UK Prince Philip Golden Award for his work in this area.
Source - Wikipedia