In distance education, the learner works alone or in a group, guided by ______.

Answer: study materials.

Explanation: In distance education, learners study independently or in groups and are primarily guided by specially prepared study materials. These materials are designed for self-instruction and organize the course content, activities, and assessments.

• They are self-contained and sequenced to allow learners to progress without a teacher present.

• They include clear instructions, learning objectives, examples, activities, and assessments.

• Supplementary supports such as web resources, facilitators, or mentors may be available, but these support the main role of the study materials rather than replace them.

Therefore, the most accurate completion of the sentence is that learners are guided by study materials.