The most likely answer is : try to get the reader to have an emotional response to the story
were there no more options ?
Please refer to the attachment for the explanation and answers to your questions.
1. A predicative nominative is a noun or a pronoun which follows a linking verb and refers to something before that verb. In your case, the correct answer is B, because "a shelter" goes after the linking verb "is", and refers to "a lean-to".
2. A participle has the form of infinitive + ing. In this case, the answer is D, flourishing.
Associate is the first degree you can earn and it takes 2 years to earn it. :)
