Concept:Pedagogy is the method and practice of teaching. Showing pedagogy in educational materials means these materials are designed to support effective teaching and learning processes.Explanation:Pedagogical practice in materials refers to how the content, activities, and structure follow teaching principles. For instance, a textbook with clear objectives, step-by-step explanations, and exercises demonstrates pedagogical practice. This helps teachers deliver lessons and helps learners understand concepts easily. It is not about the material value (cost) or reliability (durability) of equipment. It is also not about the teacher's personal awareness. The focus is on the material's own design for teaching.Answer:D. Pedagogical practice of materials