It is difficult to quantify a value for certain biological and ecosystem services provided, but one of these specific services gives you the ability to increase your overall grade in this class. A. Pollination Services B. Habitat/Refuges C. Genetic Resources D. Soil Formation E. Recreation F. Nutrient Cycling G. Water Regulation and Supply H. Disturbance Regulation and Erosion Control I. Waste Treatment J. Food and Raw Materials K. Atmospheric and Climate Services L. Biological Control Services.