Final answer:
Babies start visually tracking objects by the end of their fourth month. Their ability to track improves around six months as their vision becomes nearly as acute as an adult's. By ten months, infants follow objects with increased precision and show developing spatial awareness.
Step-by-step explanation:
Babies begin the critical developmental phase of visual tracking quite early in their lives. By the end of their fourth month, an infant is capable of following objects with their eyes, which is a precursor for the ability to track moving objects. This skill is part of various cognitive milestones that include the infant's growing ability to think, problem-solve, and communicate.
As the infant continues to develop, by around six months their vision improves significantly, nearly reaching the acuity of adult vision. This increased visual capacity includes better color discrimination and depth perception. Consequently, babies begin to show evidence of tracking, particularly noted as they start to grab, hold, and transfer objects from hand to hand.
By ten months, a baby's tracking ability has typically advanced further. They will follow objects visually with more precision, such as looking for a toy that they've dropped, indicating not only better visual tracking but also developing spatial awareness.