Final answer:
The soil in coniferous forests is enriched to support plant growth by soil bacteria, fallen leaves, and other factors.
Step-by-step explanation:
The soil in coniferous forests is enriched to support plant growth by a variety of factors. One of the main factors is the presence of soil bacteria, nematodes, worms, fungi, and protozoa. These microorganisms play a crucial role in decomposing organic matter, releasing nutrients like nitrogen, phosphorus, and potassium into the soil. Additionally, fallen leaves from the coniferous trees contribute to the organic matter in the soil, further enriching it.