GMAT Sentence Correction (SC) | Re: In good years, the patchwork of green fields that surround

Before we decide the subjects and their agreement with their corresponding verbs, let us refresh some facts and ask some questions.

1. What is the verb in question? “Surround” –
2. What ‘surround’? It must be some plural subject.
3. What are the available plural subjects prior to surround? There is only one plural subject i.e. ‘green fields’.

In addition, as per the relative pronountouch - rule, the relative pronoun modifies the noun just before it and assumes all the characteristics