Final answer:
Self-directed learning is essential because it helps individuals learn more effectively and accommodates various learning styles and motivations, thus enhancing one's ability to take control of their education.
Step-by-step explanation:
The need for self-directed learning stems from the fact that it helps individuals acquire more knowledge effectively and efficiently. Contrary to option (a), self-directed learning is not less challenging, but rather empowers learners to take control of their education. This approach aligns with the insight provided in the text, emphasizing the importance of learner responsibility and the application of personal learning strategies to achieve success.
While option (b) is the most accurate, stating that self-directed learning helps people learn more and better, the benefits extend beyond just this. It allows for a personalized learning experience, adapting to various learning styles and personality types, as mentioned in the textbook. Moreover, it nurtures a proactive mindset, which is essential for both virtual and face-to-face learning environments. Additionally, while cost-effectiveness (option c) and modernity (option d) may be consequences of self-directed learning, they are not the primary reasons for its necessity.
In conclusion, self-directed learning is crucial because it fosters an approach to education that is tailored to individual motivations, learning styles, and personality types, thereby enhancing the overall learning experience.