<span>As the breeze rises, and turn many-colored As the stir cracks and crazes their enamel.
Soon the sun's warmth makes them shed crystal shells Such heaps of broken glass to sweep away You'd think the inner dome of heaven had fallen.
Not one was left For him to conquer.</span>
Answer:
A. return
Explanation:
The technical team eventually found it necessary to go back to...
to go back to means to return.
I hope this helps. Good luck
B. Cause and effect because it explained how the coal was formed from the life millions of years ago hense the cause part and it explains also how it helps us in everyday life now millions of years later effect.