Which environment is associated with button bush?

Button bush, scientifically known as Cephalanthus occidentalis, is primarily found in wetland environments, which include swamps and marshes. It is particularly associated with marshes due to their specific hydrology and vegetation structure. Marshes are characterized by herbaceous (non-woody) plants and saturated soil, providing the ideal conditions for button bush to thrive. This plant prefers full sun exposure and often grows in the shallow waters or along the edges of freshwater marshes, contributing to the unique biodiversity of these areas.

Swamps and bogs have different characteristics; swamps are typically dominated by woody plants, while bogs are characterized by acidic water and sphagnum moss, which isn't conducive to the growth of button bush. Forest environments also lack the necessary wet conditions that button bush requires to flourish. Thus, the association of button bush with marshes is based on its ecological preferences, making this the correct choice.