In 1980, robert selman described five stages in children's changing concepts of friendship. in the stage, children remain egoistic. their concept of a friend is one who likes to play with the same things and lives nearby.

The correct answer is 'Momentary Playmates'. 

During the momentary playmates stage of Selman's theory of children's changing concepts of friendship, children aged three to seven years old typically consider a close friend one who lives close to them and likes to play the same games as they do. At this stage, children have not formed the concept of an enduring and reciprocal friendship. In the momentary playmates stage children remain egotistical and only see what they can obtain by being friends with another child.