Final answer:
The aspect highlighted in the line is the setting in nature in pastoral poetry.
Step-by-step explanation:
The aspect of pastoral poetry highlighted by the following line: "There will we sit upon the rocks/And see the shepherds feed their flocks" is a setting in nature. Pastoral poetry often portrays an idealized rural landscape, where shepherds and their flocks exist in harmony with nature. The line exemplifies this aspect by describing a scene of sitting on rocks and observing the shepherds tending to their flocks in a natural setting.
Learn more about The aspect of pastoral poetry highlighted by the line