Correct option is D
Fraction discs, also known as fraction manipulatives, are physical tools that allow students to see and manipulate fractions in a tangible way. They help learners understand concepts like equivalent fractions by representing them visually. In this case, using fraction discs, you can show that if you divide a whole into 3 equal parts and shade 2 of them, it's the same as dividing it into 6 equal parts and shading 4 of them. This visual representation makes the concept of equivalence clear and intuitive for young learners, making it an effective teaching method.