What task of infancy is aided by a baby's ability to recognize its mother's voice?

I believe the answer is: seeking sustenance or learning to speak
By the age of 10 weeks - 6 month, infants would develop certain attachment to their closest caretakers.
They tend  seek substance (such as when they're hungry) if they hear their mother voices and feel her presence.

which of the following is a subsurface event that takes place during the rock cycle?

  cementing  erosion  melting  weathering