Which of the following statements about learning and retention is true?

Demonstrating the same content in different ways can enhance learning and retention because it allows learners to process the information from multiple perspectives. This multi-modal approach caters to various learning styles and can reinforce understanding. When a concept is presented through visual aids, verbal explanations, and hands-on experiences, it creates a more engaging and comprehensive learning environment. Such varied demonstrations help to solidify the information in the learner's memory, leading to improved retention and application of the knowledge.

The first option suggests that presenting content in different formats has no impact, which overlooks the benefits of varied instructional strategies. The claim that learning primarily comes through visual aids denies the importance of other formats and methods that can cater to different learning preferences. Lastly, stating that retention relies solely on written materials ignores the multitude of effective teaching techniques, such as auditory, kinesthetic, and interactive methods, that can contribute significantly to retention. In summary, the idea presented in the correct answer emphasizes a more effective and inclusive approach to learning and retention.