Final answer:
Solid foods are generally introduced to a baby at around 6 months of age, when they exhibit adequate motor skills and developmental milestones that support eating solid foods.
Step-by-step explanation:
According to the Centers for Disease Control and Prevention (CDC), the recommended age range to introduce solid foods to a baby is at around 6 months of age. By this time, most babies develop the ability to sit, show improved vision, begin teething, and have the motor skills required to handle solids, such as the ability to pick up objects and transfer them from hand to hand. Introducing solid foods before 4 months is generally not recommended, and waiting too long after 6 months may cause delays in food acceptance and possible nutritional deficiencies.