Read the passage and answer the question that follows:Education has always been considered the cornerstone of human progress. From the earliest civilizations, people recognized the importance of passing knowledge from one generation to the next. In ancient times, oral traditions were the primary means of teaching, with elders sharing stories, myths, and practical skills. As societies grew more complex, the need for formal education became evident. Schools emerged, often attached to religious institutions, where reading, writing, and moral lessons were taught.The invention of the printing press in the 15th century revolutionized education by making books more accessible. Knowledge was no longer confined to the wealthy or the clergy; ordinary citizens could now learn to read and explore new ideas. This democratization of learning paved the way for scientific discoveries, social reforms, and cultural growth. Education became a powerful tool for shaping societies, encouraging critical thinking, and promoting equality.In the modern era, education has expanded beyond traditional classrooms. Technology has introduced new methods of learning, such as online courses, interactive platforms, and virtual classrooms. Students today can access information instantly, collaborate with peers across the globe, and develop skills that prepare them for a rapidly changing world. However, this progress also raises challenges. The digital divide means that not everyone has equal access to technology, and questions about the quality of online education continue to emerge.Despite these challenges, the value of education remains undeniable. It empowers individuals to pursue their dreams, equips them with the tools to solve problems, and fosters empathy by exposing them to diverse perspectives. A well-educated society is better prepared to face global issues such as climate change, poverty, and inequality. Ultimately, education is not just about acquiring knowledge; it is about cultivating wisdom, responsibility, and the ability to contribute meaningfully to the world.What is one challenge of modern education mentioned in the passage?