Final answer:
Tangible products (option A) are physical items that consumers can touch and use, including consumer goods and capital goods, distinguished from intangible services.
Step-by-step explanation:
The things that are physical in nature, such as color and size, are known as tangible products(option A). Tangible products are items that consumers can physically touch and use. These include consumer goods like shoes, backpacks, and cars, as well as capital goods that are used to produce other goods and services. Unlike intangible services, tangible products often have a physical presence that makes them uniquely identifiable, and this physicality contributes to their value as economic products.