Answer:
having a career
Step-by-step explanation:
The majority of the younger people, or rather the emerging adults, have different goals in life than the generations prior to them. The emerging adults in general primarily focus on having a career. They commit their 20's and often 30's in order to have a nice career and became financially strong, as well as having a good reputation. This postpones having family, and even after they decide to get married, having children is further postponed because of the career goals. That results in having a nice career, if everything goes to plan of course, though more often than not it doesn't, form a family relatively late, and have the biological time to only have one child, and rarely two.