Final answer:
Forest soils are indeed more acidic than grassland soils due to organic acids from leaf litter and the effects of acid rain.
Step-by-step explanation:
The statement that soils developed in forest settings tend to be more acidic than those developed in grasslands is true. In forest biomes, particularly where pine and other conifers are prevalent, the leaf litter and other organic material can create a thick layer on the forest floor, which as it decays, releases organic acids such as tannic and humic acids. This contributes to the acidity of the soil. Additionally, acid rain, caused by the release of sulfur dioxide gas from burning fossil fuels, can also increase soil acidity, especially in forest areas where the vegetation is thick and can trap more of these acidic compounds. The impact is less pronounced in grasslands.