Multicultural studies report that the best way to develop babies' sleep rhythms seems to be

The answer is: fall asleep whenever they feel tired

Sleep is your body's natural response to put itself into rest and recharge after undergone a certain level of work.

If the babies are let go in an active environment, their sleeping pattern would automatically adjust itself and putting them into sleep whenever they feel tired after their activities.

this question your asking is true hope this and you get a 100 percent : )

where is the rest of the question. this isn't making sense. can you upload a picture of the question?