The propensity of 10-month-old Russell to tug at the Velcro straps on his hat, remove his hat, and get the other children at the day-care center to repeat the same actions themselves is an example of a .

“expert” baby who is able to teach skills and information to other infants  

Explanation:

The propensity of 10-month-old Russell to tug at the Velcro straps on his hat, remove his hat, and get the other children at the day-care center to repeat the same actions themselves is an example of an “expert” baby who is able to teach skills and information to other infants.  Russell is an expert baby who is capable of teaching his peers.

answer; analytical,creative and practical;

fertile good for trade etc