Final answer:
Legos are the product most likely segmented by age, with different sets tailored for various age groups, from preschoolers to adults.
Step-by-step explanation:
The product most likely to have its market segment based on age is d) Legos. Legos are widely recognized as a versatile toy that targets different age groups with various levels of complexity. For example, Lego Duplo sets are designed for preschoolers, while more advanced sets might appeal to older children and adults who enjoy complex building projects. This segmentation ensures that the product meets the developmental needs and interests of a wide range of customers categorized by age.