When an immigrant family arrives in a new country and engages in previously functional behavior that no longer serves a social function in the new cultural environment, the functionalist perspective predicts that the

behaviour would not pass onto the new generation

Explanation:

Immigrant family is the family that does not belong to the place, rather belongs to some different city originally.

When they visit to a  new country and are not updated with the functional or social behaviour, they cannot communicate well. As there efforts of communication are not in the right way, because those functional behaviour do not serve now as a social function in the current country.

Thus, the chances are that the behaviour shall not be considered by the new generation. As the older generation knows the past too of the city they can connect with immigrants even with their behaviour being old to the city norms.

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explanation:

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answer; the values, beliefs, and assumptions about appropriate behavior that members of an organization share;