Answer
1. RESTRICTIVE; no commas needed.
2. RESTRICTIVE; no commas needed.
3. NONRESTRICTIVE; commas are needed.
4. NONRESTRICTIVE; commas are needed.
5. RESTRICTIVE; no commas needed.
To my mind, the correct answer is “to help the reader understand how the fuel system on a spacecraft works to help the reader understand the difficult decisions faced by Mission Control”. The aim of including a problem-solution text structure is to organize the author´s ideas in a way that helps the audience to gain understanding of the text. In addition, this device is very useful to call the attention of the audience and to make the text more appealing to them.
This means that you have alot of love to offer, i would think. Another possibility would be that you have a lot of love to give, but not many take it? It depends on the rest of the poem, but the having a lot of love to give is a better answer.
Hope that helped :)
It tells the audience what is going to happen to the play, and it shows the central conflict between families