I would say a reflection on what was learned, or a discussion about how the experience caused change, but i would more likely go for the first one that i suggested. Hope i helped :)
With the gradient because the molecules are going from high to low concentrated areas
Answer:
The doctor didn't want them to see how much pain Johnny was in, but because they were his friends (not because of the blade) the doctor decided to let them in anyways.
Answer:
subject: Jesus Christ
linking verb: is
Predicate noun: the only saviour