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.
I would Love to help out, but I can't see the answers Dx
When it is a linking verb, it contains a adjective right after the main verb (is/feel/were/was) and must express the person.
Example: I feel sad.
"Feel" is the main verb in this sentence and it is expressing ones emotion. So if that is the verb, then "sad" is the adjective. Because of this example, you can see that
"Were" in the sentence is the main verb and after those are the adjectives ( tired and dirty). Therefore, you just found a linking verb.
Then answer would be (A)
EMJOY!!