Question

sitting outside for years will the wooden deck chairs so they become smooth and gray instead of splintery and brown. sediment weather mineral

Explanation:

The verb "weather" means to be worn or altered by the action of the weather. In the context of the sentence, sitting outside (exposure to weather elements like sun, rain, wind over years) will act on the wooden deck chairs, changing their appearance (from splintery and brown to smooth and gray). "Sediment" refers to matter that settles to the bottom of a liquid, and "mineral" is a solid inorganic substance of natural occurrence. Neither of these words fit the context of the sentence as they don't describe the action of the weather on the chairs.

Answer:

weather