Which of the following is a sign of puberty? a. intense changes in hormone balance b. increased height and strength c. development of sexual characteristics d. all of the above

What ethic groups are most affected by obesity and why?

According to ainsworth's research, in a new situation such as beginning child care placement, which children will be most likely to go to their mother for comfort when she returns? a. disorganized-disoriented b. insecure-ambivalent c. insecure-avoidant d. securely attached

How does nitrogen oxides are produced and their air environment impact