You can use the fourth verse. below is an interpretation of the verse.
when we are divided or separated
we sorrow or we hurt
we shall be joined in heart(maybe not physically but the person that passes forever holds a special place in someone's heart.)
but hope to see each other again.
Answer:
the answer would be cause and affect. when the oxygen is added to the rats environment the rat can breathe so when it is added the rat will start to breathe causing the rat to change its behavior. when there is no oxygen the rat cant breathe most likely causing the rat to panic because there is no air so when air is added the panicked rat would stop panicking because now it can breathe again
Explanation:
