What connection does the author draw between what researchers have learned about babies' social development and parenting?

The connection that the author draws is that if parents show their kids kindness to other people, the baby will copy them and show kindness to other people as well.

Explanation:

The researchers showed the babies video's of people sharing. Because the babies watched those video's the babies started to share toys with the researchers. Therefore if parents show kindness to other people, then the babies will copy them.