Which of the following conditions can result from soft wood that breaks apart?

The condition that results from soft wood breaking apart is indeed dry rot. Dry rot is a fungal decay that affects wood when it has a moisture content above 20%, leading to weakened and soft wood fibers that may crumble or split apart. This specific condition occurs as the fungus breaks down the cellulose and hemicellulose in the wood, ultimately compromising its structural integrity.

In comparison, while excessive moisture can lead to issues with wood breakdown, dry rot specifically refers to the type of decay caused by fungi. Earth to wood contact and inaccessible or obstructed areas may contribute to wood deterioration by providing conditions favorable for pests or moisture accumulation, but they do not directly result in the breakdown of wood in the same way that dry rot does. Therefore, the very nature of dry rot signifies that it specifically is the result of soft wood becoming compromised and breaking apart.