Baby Chuck reaches and grips a toy using his whole hand. This ability is called the

A. proximodistal; cephalocaudal: This is reversed: proximodistal means center-out (trunk to extremities), and cephalocaudal means head-to-tail.
B. cephalocaudal; proximodistal: Cephalocaudal describes development from head to tail, and proximodistal describes development from the center outward (trunk to limbs); this order is correct.
C. temporal; parietal: Temporal and parietal are brain lobes, not terms for directional patterns of physical development.
D. parietal; temporal: Again, these are anatomical brain regions and do not describe head-to-tail or trunk-to-extremity developmental patterns.

A. find something to grasp: Grasping is produced by the palmar (or palmer) grasp reflex, not the rooting reflex; rooting directs head/mouth movements.
B. calm down: Rooting itself is an orienting reflex; while successful sucking can soothe an infant, the reflex’s primary purpose is locating a nipple, not direct calming.
C. find something to suck: The rooting reflex causes infants to turn toward cheek stimulation and open the mouth so they can latch and suck (feeding).
D. go to sleep: Rooting does not purposefully induce sleep; it’s an adaptive feeding reflex.