In reference to infancy, Bowlby believed that . Infant development is a contribution of genetics and environment. Infants do best by being raised by a family consisting of siblings, parents, and grandparents. The relationship an infant has with his or her primary caregiver is most important. Infants are more likely to cry in response to the cry of another infant, compared to that of a chimpanzee.

The relationship an infant has with his or her primary caregiver is most important.

Explanation:

During the early stages of development, in the infancy, the child has his/her parents and who is closer to him/her as a primary reference. It's at this moment that child will begin to understand the world and the rules that must be followed. The parents or caregivers are responsible for this learning process.

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