Stages of artificial seasoning

Freshly felled. Freshly felled wood is sometimes called green wood.  

Air dry. Air dry wood has reached the stage of the seasoning process by which the moisture content that was as high as 50% when the wood was first cut has dropped to around 25%. .

House dry

Explanation:

i'm thinking (a) to keep sand in place; ////////////

explanation: a sand fence or sandbreak, like a snow fence, is used to force windblown, drifting sand to accumulate in a desired place. sand fences are employed to control erosion, sand dune stabilization, keep sand off roadways, and to recruit new material in desert areas.