Which of the following is NOT considered a soil organism?

Rocks are not considered soil organisms because they are inorganic materials that do not possess any biological characteristics or functions. Soil organisms refer specifically to living entities within the soil ecosystem that contribute to various ecological processes such as decomposition, nutrient cycling, and soil formation.

Worms, moles, and ants all play significant roles in maintaining soil health. Worms, for instance, aerate the soil and contribute organic matter through their castings. Moles help with soil aeration and control insect populations. Ants are important for seed dispersal, soil aeration, and nutrient recycling. These organisms interact with the soil and contribute to its vibrancy, whereas rocks do not engage in these biological processes.