When a vessel capsizes, first thing is to check the safety of everyone.
You need to do a head-count to ensure that all passengers of the vessel are there and then make sure that they are all wearing life-jackets.
B represents a person with osteoporosis due to excessive bone reabsorption.
The answer should be both
The answer is D ) Guard Cells.
Guard cells are like a door, they let somethings in and some things out or think of it like a filter it lets certain things in and out
