The impact of any child-rearing practice is affected by the

Once wariness of strangers develops after 6 months,

A) babies use the familiar caregiver as a secure base from which to explore. B) other typical fears decline. C) the stranger's style of interaction does little to comfort babies. D) infants resist exploring new environments.

Lately, Buck has been gaining weight, even though his diet and activity levels have not changed. If his doctor suspects that there is an endocrine problem affecting Buck's metabolism, he would start by examining Buck's ________.

A. adrenal medulla B. pineal gland C. adrenal cortex D. thyroid