Some practical info on our wood Amish Furniture.
Yes, wood is a product of nature and is a living organism and can "breathe". Wood that is kiln dired to 6% (industry standard) can take in moisture up to levels of 12% if placed in a high humidity environment. For further research on this please read this document from Purdue: The Shrinking and Swelling of Wood and Its Effect on Furniture.
We have many hardwoods to choose from including rustics, live edge, and reclaimed woods. Some have a long flowing grain, while others have a shorter grain. Some woods (i.e. Brown Maple and Hickory) show a greater degree of stain variation than others. Some woods are harder than others (see our wood hardness page) and are better suited for high-traffic areas of the home. Some woods will darken more quickly than others when exposed to prolonged periods of direct sunlight. With each wood, you have a choice of stain color.