The efforts to save a culture by infusing it with a new purpose and life are collectively called:

Revitalization movement is the effort to save a culture by fusing it with new purposes.

Explanation

Revitalization movements are acts or attempts in creating a new adaptive culture based on the previous culture by bringing a significant amount of improvisations.

The varieties of revitalization movement are

•Nativistic

•Revivalistic

•Messianic

•Utopian

These movements owe to some prophets or leaders who brought in the urge to create a new culture from existing culture.

The purpose of these movements is to bring stability and satisfaction among the people.

the answer to your question is,

d. when a child was born.

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answer; a council of the best hunters;