Final answer:
If someone has failed to master the developmental task of trust according to Erikson's lifecycle stages, they may demonstrate difficulty feeling safety in relationships with others.
Step-by-step explanation:
According to Erikson's lifecycle stages, if someone has failed to master the developmental task of trust, that person may demonstrate difficulty feeling safety in relationships with others. In Erikson's theory, the first stage of development is trust versus mistrust, which occurs during infancy. Caregivers who are responsive and meet their baby's needs help them develop a sense of trust and view the world as safe and predictable. On the other hand, unresponsive caregivers may lead to feelings of anxiety and mistrust in the infant.