After reading about Harry Harlow's research, Helen now knows that: babies need to be touched and held to develop normally. This is further explained below.
Generally, a very young kid (in particular) or a very young animal. In a group, b refers to the youngest member. His position in the household is that of the youngest child.
In conclusion, Helen has learned from Harry Harlow's study that holding and touching an infant is essential to the child's healthy development.
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