Answer:
If clay is absent, sand is the best option from the given choices D.
Step-by-step explanation:
Sand is a common material used in construction and landscaping when clay is not available. It is a granular material that can be used as a base for roads and buildings, as well as for filling in gaps and leveling surfaces. Sand can also be used to create molds for casting metal or other materials.
Cement, marble, and stone dust are not suitable alternatives to clay as they are not malleable or pliable materials like clay. Paper mache is a mixture of paper and adhesive that can be molded into different shapes, but it is not as strong or durable as clay or sand. Therefore, sand is the most practical and effective option when clay is not available.