Having a secure base first becomes important to the infant when he or she
a. suffers from intermittent episodes of malnutrition.
b. achieves mobility by crawling.
c. gets fed up with being smothered by affection.
d. notices that the faulty room heater is slow to warm up.
Question 2
Interpreting the effects of different environments on separately reared twins is complicated by the fact that
a. the twins often visit each other surreptitiously.
b. even different environments share many similarities.
c. genes detect habitat changes and then adapt.
d. twins may be embarrassed to admit to running away.