Final answer:
The behavior where infants hold objects clumsily between their finger and their palm at three to four months of age is known as the ulnar grasp, which is part of early motor development and aids in maintaining contact with caregivers.
option 4.
Step-by-step explanation:
At three to four months of age, infants often hold objects clumsily between their finger and their palm in what is known as the ulnar grasp. The ulnar grasp allows infants to grasp objects by pressing them against their palm with their fingers, particularly the pinky side or ulnar side of the hand. This is different from the pincer grasp, which develops later, around ten months of age, where infants use the tips of the thumb and forefinger to pick up objects.
The ulnar grasp is one of several reflex behaviors observed in infants that plays a role in their early developmental stages. These innate behaviors, including the sucking reflex and grasping reflex, aid in survival by helping to ensure an infant maintains close physical contact with the caregiver and can feed effectively.