What category would you put the following text in?
All the village went to the picnic, and they started bright and early in the morning, with horses and farm-wagons, and baskets full of good things to eat, and soon arrived at the bridge.
The sentence describes the setting or place in which the picnic takes place. It draws attention to the objects (baskets, horses, wagons) that can be seen at the picnic, and states that everyone arrived at the bridge.