Lines 10,11,12,13,14,16 those are the repetition in the poem
Solar technologies generate a majority of the power used during space missions, keeping life support and other vital spacecraft systems working. Solar power is so critical that NASA spends considerable time and money to make solar panels must more efficient, lightweight and affordable.
The correct answer is: [D]:
___________________________________________________________
"<span>A class learned sign language to help a classmate."
___________________________________________________________</span>