Jade explains to her pediatrician that her 6-week-old baby is always crying, and she is concerned because her mother-in-law told her this is caused by jade's return to work. jade explains that her baby has been crying since birth. her pediatrician explains that her baby has colic, which is caused by

immature immune system

Explanation:

Colic is a condition where an infant cries for unknown reasons. Generally infant cries when they are hungry or needs diaper change or has some other problems. But it is seen that those babies who are well taken care off and are well feed also cries non stop for unknown reason.

                         Such babies are said to have been suffering colics. It is caused by unknown germs that causes pain in their stomach. Babies with colics may be allergic to milk. Babies have immature immune systems which causes colics

                         Colics are harmless and they last for the first few months ranging from 1 month to the 5 month.

Thus the answer is immature immune system.

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