The caged bird singswith a joyous songof the captive life that kept it safe all along.This answer exemplifies the two birds: free and caged. Free in such a way that it is able to sing a song of its choice, and caged, because even if it is in captive it has something to be thankful for, its safety.
D. Three is definitely a run-on sentence, but this option makes the most sense.
(This is about a tiger, haha)
Its claws were so sharp, so they realized it's too dangerous to risk their lives to approach the tiger.
Answer:
The slanted highway embankment
Hope this helps!
--Applepi101
