Long-term goals take ______ to complete.

Long-term goals typically require a significant investment of time and effort to achieve, often extending beyond a year. This duration allows for the development and maintenance of skills, habits, and improvements, as achieving such goals involves multiple stages, including planning, execution, and adjustments over time. Throughout this process, individuals may face challenges and setbacks, necessitating perseverance and sustained commitment.

In contrast, short-term goals can often be accomplished in a day or a week, while medium-term goals might take a couple of months. However, the nature of long-term goals involves a more substantial timeframe that aligns with comprehensive lifestyle changes or significant achievements. Therefore, the correct choice emphasizes the reality that meaningful and lasting objectives often require over a year to fully realize.