Infants, like all people, are exposed to massive amounts of information; therefore, they must focus their attention and select information so as not to be overwhelmed. Thus, children must:.

encode selectively                                                  

Explanation:

In psychology, selective encoding is defined as a phenomenon through which a child gets insight about different problems and distinguishes it on the basis of a problem which is being considered as important and problem which is considered as irrelevant. In other words, a child will look for a problem which he or she finds to be important while working on something whereas ignores other things.

In reference to the given question, children must encode selectively.