Answer:
preconventional
Explanation:
In the preconventional stage of Kohlberg's stages of development a child obey's rules which are set by the parents and they avoid circumstances which may lead to punishment.
Here, Sam is concerned that taking another child's toy will make his mom mad. He is actively trying to avoid any situation that may cause him to get punished.
Hence, Sam is in the preconventional stage of moral development.
