Answer:
but much research has been done and more has learned about brain injuries in the last 5 years
Explanation:
because this shows they are telling more players about the injuries and informing them about the dangers of playing
A. <span>It creates a melancholy mood that reflects the narrator’s feelings.
The imagery described in this paragraph is very melancholy, which seems to support the narrator's feelings.
He uses phrases like "patches of snow and earth" and "spotty clouds" which give the image of incompleteness, something not quite full.
He also uses images of darkness, "black trees" and "the stars were out" which support the unhappiness of the narrator's mood. </span>
A comma after an unfamiliar word
I believe the answer is piety.