Final answer:
Solids can be safely introduced to an infant around six months of age, which aligns with significant developmental milestones and improvements in motor control and interest in the environment.
Step-by-step explanation:
It is generally considered safe to introduce solids to an infant around six months of age. At this point in development, infants typically exhibit increased motor control, such as the ability to pick up objects and transfer them from hand to hand, and show an interest in their environment, which includes reaching for food and being able to sit up with support. The introduction of solid foods coincides with significant developmental milestones such as improved vision, the onset of teething, and the ability to make two-syllable sounds. As infants approach their first year, they continue to make remarkable progress in motor, sensory, and cognitive abilities and display readiness for more textured foods by demonstrating skills like the pincer grasp.
Remember to consult with a pediatrician prior to introducing solids to ensure that it is appropriate for your individual child's development and health.