Which of the following factors varies in oils?

The correct choice highlights that density, fat content, and heaviness can vary in oils due to their differing compositions and sources. Oils can be derived from various plants, seeds, or animals, each with unique characteristics that influence their density and fat content. For instance, olive oil may have a different density and fat profile compared to coconut oil or sunflower oil. This variation affects not only how the oils behave in applications—whether they are heavy or light—but also their nutritional properties.

By considering these factors, professionals in the field can select appropriate oils for specific uses, whether in cooking, cosmetics, or skincare. Understanding how these attributes vary enables better decision-making in product formulation and application.