Complete the sentences with the correct words.
If you've ever put your finger in a newborn baby's hand, you likely noticed that the baby gripped
your finger very tightly. This is something babies do without thinking. Scientists think that
clinging to objects may help teach newborns how to use their hands. Babies
usually for 4 to 6 months.
only have this
reaction
However, its impact on a person's lifelong ability to use their hands is