Final answer:
Erika and Hans are part of the same Social Circle, which is a group with similar interests and activities. They represent the Millennial Generation, characterized by different attitudes towards life stages and key life events compared to previous generations.
Step-by-step explanation:
Erika and Hans, aged 21 and 22 respectively, have shared many different experiences such as attending a U2 concert in Brussels, skydiving in Bonn, and sailing in the Irish Sea. They could be said to be part of the same Social Circle. This term refers to a group of friends or acquaintances who engage in similar activities or have similar interests. As members of this social circle, they share experiences that are distinct from other age groups, reflecting a pattern of socialization found in the Millennial Generation. This generation is characterized by a shift in how they approach traditional milestones and lifestyle choices, as outlined in research by the Pew Research Center and discussions on the social structuring of later life.
Millennials, generally defined as those born from the early 1980s to the mid-1990s, have different attitudes towards various life stages compared to previous generations such as Baby Boomers and Gen Xers. They view childhood as ending later, and have redefined the onset of old age. Their shared experiences, such as those of Erika and Hans, embody the broad, adventurous, and unconventional paths that many Millennials are taking, often including travel and postponing commitments, as observed in various sociological studies.