Which of the following is a benefit of physical activity? A. Higher blood pressure
O
B. Greater risk of heart attack
C. Higher BMI (body mass index)
D. More restful sleep

Which of the following is an important function of child-directed speech? (a) it captures the infant’s attention and maintains communication. (b) it reduces the occurrence of infantile amnesia for the earliest memories of infancy. (c) it reduces the need for reciprocal interaction between caregivers and children. (d) it assists in prolonging rem sleep in infants.