Final answer:
By six months, infants can hold flat objects and show increased control of fine motor skills, including hand-to-hand transfer, sitting up with support, and a developing pincer grasp.
Step-by-step explanation:
By six months, the infant can hold crackers, cookies, and other flat objects, signifying increasing control of the fine motor skills.
Around this age, infants normally develop the ability to pick up and transfer objects from hand to hand. They also begin to exhibit improved coordination, such as sitting up with support and grasping objects with a more sophisticated pincer grasp.
At six months, notable developmental milestones include the eruption of deciduous teeth (baby teeth), making two-syllable sounds like "mama" or "dada," and showing visual and depth perception nearly comparable to adults.