Final answer:
This is an example of how priorities and lifestyle change after having a child.
Step-by-step explanation:
This situation can be considered as an example of how priorities and lifestyle change after having a child. Eli and Susan used to go trekking in the Colorado mountains, but now they go for shorter strolls and rarely take vacations. This change in their activities is a result of their new responsibility as parents and the need to prioritize their child's well-being and safety over their own recreational pursuits.