Which characteristic is true of the grasp reflex in infants?

The grasp reflex in infants, also known as the palmar grasp reflex, is a primitive reflex that involves an involuntary grasping motion when the palm is stimulated. This reflex typically appears shortly after birth and is most pronounced in the first few months of life. The key point about this reflex is that it usually begins to diminish and become less pronounced around the age of 6 months, as the infant gains more voluntary control over their movements.

By this age, infants start to develop more purposeful grasping skills, and the primitive reflexive behavior is replaced by voluntary interactions with objects. Therefore, the statement that the grasp reflex disappears by 6 months accurately reflects the developmental timeline of this reflex.

In contrast, a characteristic such as it developing around 12 months is incorrect, as the reflex is already established well before this time. Additionally, saying it begins to develop between 2 and 6 months does not align with the typical timing, as it actually emerges earlier. Lastly, it is not a permanent reflex; rather, it serves a temporary role in motor development during infancy.