Final answer:
In Erik Erikson's theory of psychosocial development, a newborn's main task is to develop a sense of trust, which is fundamental for viewing the world as a safe place.
Step-by-step explanation:
Erik Erikson's theory of psychosocial development outlines eight stages that individuals go through during their lives. Each stage presents a unique developmental task they are to resolve. Erik, being a newborn, is at the first stage, which is infancy. According to Erikson, Erik's main task will be to develop a sense of trust as opposed to mistrust. This is a foundational stage where responsive and attentive caregiving can lead infants to view the world as a safe and predictable place, thereby fostering a sense of trust.