Final answer:
Identity exploration is one of the five key features that characterize individuals in the phase of emerging adulthood, according to Arnett.
Step-by-step explanation:
According to Arnett, one of the five key features that characterize individuals in the phase of emerging adulthood is identity exploration. Emerging adulthood is a relatively newly defined period of lifespan development, usually spanning from 18 years old to the mid-20s, where individuals focus on exploring their options and making decisions about their work and love life.