Concept:A good Teaching-Learning Material (TLM) is designed to make the teaching and learning process more effective and engaging.Explanation:TLMs include items like charts, models, videos, and flashcards. They help teachers explain difficult ideas in a simple way. Students can see, touch, or interact with these materials, which makes learning active and fun. While a TLM can sometimes help in language learning or provide entertainment, its main job is to support the entire teaching-learning process. It helps both the teacher and the student. A good TLM makes abstract concepts clear and suits different learning styles. This improves understanding and retention.Answer:C. facilitate the teaching-learning process.