​PASTORAL: RURAL

Given: ​PASTORAL: RURAL

Lets check all options;

Option (a): Metropolitan: Urban (True)

A metropolitan area is an urban or city area.

Option (b): Harvest: Autumn (False)

Harvest happens in many seasons depending on the crop, not exclusively in autumn.

Option (c): Agrarian: Benevolent (False)

"Agrarian" refers to something related to farming or rural areas, while "benevolent" means kind-hearted or well-meaning. These words don’t really have a direct relationship in meaning or context.

Option (D): Sleepy: Nocturnal (False)

"Sleepy" describes a state of drowsiness, while "nocturnal" refers to animals or things active at night. Sleepiness can happen at any time, and nocturnal is a specific trait of animals or behavior, not directly about being sleepy.

Thus, the correct answer is (a).