Final answer:
Structures such as houses and barns, as well as natural resources that have been altered by humans, are considered affixed to the land. This also includes improvements like grain silos and fencing that are part of the property. The metes and bounds system illustrates how permanent and semi-permanent natural landmarks can demarcate land, causing difficulties in determining exact property lines.
Step-by-step explanation:
Things that are considered "affixed" to the land include structures and items that are attached to the land in a way that cannot easily be removed without damage to the land itself. Structures like houses, farm buildings such as barns, grain silos, and fencing are typical examples of things attached to a parcel of land. In the context of the metes and bounds system, property lines could be demarcated by permanent natural landmarks or semi-permanent features like trees and boulders. This system created challenges in property delineation, especially when based on moveable objects. In terms of natural resources, land refers to that which is provided by nature, like water sources and mineral deposits, and has not been altered by human effort. However, once humans take these resources and create structures or alter the landscape in a way that cannot easily be reversed, these become affixed to the land.