No comma needed
The game was delayed because the field was wet.
Happy
Because he said "improved" several times, and improvement is a good thing that makes most people happy
To descend down with a rope. Usually down the side of a mountain.
C. The quarterback scored in the fourth quarter
Enjambment - the sentences do not finish with the end of the line.
Simile - "like a slackened drum"
Maybe even hyperbole, since it is an exaggeration.
