What term describes the eating of non-food substances like dirt or sand?

The correct term for the consumption of non-food substances, such as dirt or sand, is "pica." This behavior can be observed in various animals and may arise from nutritional deficiencies, behavioral issues, or environmental factors. Pica is particularly interesting because it highlights the complex interactions between an animal's dietary needs and its environment.

Understanding pica is important in animal science because it can indicate underlying health concerns or stressors in an animal's habitat. Monitoring this behavior can aid in managing animals' diets and ensuring their well-being.

The other options relate to different behaviors or conditions. Coprophagia refers to the eating of feces, which serves specific biological functions in some animals, such as obtaining nutrients. Malnutrition pertains to inadequate nutrition, which might lead to various health problems but does not specifically describe the act of consuming non-food items. Grazing refers to the feeding behavior of herbivores who consume grass and other plants. Each term has its own distinct meaning within the context of animal feeding and behavior.