Eight-month-old atlas is able to climb the stairs when his mother helps him by encouraging him vocally and giving him little pus

I think the answer is: The zone of proximal development.

The zone of proximal development describes the learning space where learners can distinguish what they can achieve independently and what requires assistance.

Recognizing this zone is essential in the learning process, as it provides learners with insight into the actions they need to take in the future to overcome challenges without external help.