Octopuses' ability to squirt ink is the answer because physiological deals with a body parts function not the body part itself.
The answer is (2)
(1) and (3) are obviously wrong.
If thy stop reproducing then the whole population could die and (3) is just crazy.
(4) is also inncorrect because of they run out of foo then they all will die.
(2) is the one that makes the most sense
Brick is not a mineral (it is man-made)
B) bones and Muscles hope this helps