Which alliterative phrase best reflects the theme that the world contains dark and powerful forces?
"could frame thy fearful symmetry"
"in what distant deeps or skies"
"thy heart began to beat"
"tyger, tyger burning bright"

The correct answer for this question would be the second option. The alliterative phrase that best reflects the theme that the world contains dark and powerful forces is this: "In what distant deeps or skies". Hope this is the answer that you are looking for. 

His writing and speech is quite different than today’s. students struggle understanding because of unfamiliar words.