Which of the following best illustrates an unplanned change for a family?

An unplanned change for a family is best illustrated by the situation involving unexpected job loss. This type of change can occur suddenly and without warning, leading to significant emotional and financial impacts on the family. It creates a context of uncertainty and requires immediate adaptation, as the family must respond to the new reality of reduced income, potential lifestyle changes, and the need to consider new job opportunities or financial assistance.

In contrast, planning for a wedding, moving to a new house, and receiving a promotion are all examples of planned changes. These situations involve anticipation and preparation, allowing families to strategize and make decisions based on their goals and timelines. They typically come with a degree of control and foresight, mitigating the stress and unpredictability associated with unplanned changes. Thus, the unexpected job loss stands out as the correct representation of an unplanned change within the family context.