Is there a lesson to be learned from the myth “apollo and hyacinthus”

Which of these can an adverbial clause modify?

7. a line of symmetry divides a design so that every point on one side of the line coincides a point on the other side of it determine how many lines of symmetry each figure below has then draw all the lines of symmetry. show your work

Which verb or verb phrase signals an inappropriate shift in mood. a) will you let b) should first change c) must attend d) will be served