When air conditioning became available for homes, people tended to stay inside to keep cool in the evenings instead of sitting on their front porches. over time, the concept of neighbors watching out for one another changed. this is an example of:

This is an example of social change.

Explanation:

Social change is the transformation of society and its mode of organization. It stems from habits and customs that stop doing or start to be part of people's daily lives. An example of this can be seen in the question above, where the existence of air conditioning has changed the neighborhood's habit of sitting in front of their homes to cool off and take care of each other. The social change shown in the above question occurred intentionally as no citizen provoked it.

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