Understanding Material Hardness

Materials have different physical properties, one of which is hardness. Hardness refers to the resistance of a material to deformation, indentation, or scratching. Hard materials maintain their shape and resist being compressed or scratched easily, while soft materials can be easily deformed or compressed.

Analyzing the Given Options

Let's examine each option based on the concept of hardness:

• Cotton: Cotton is a soft, fibrous material. It is easily compressed and does not resist deformation. Therefore, cotton is considered a soft material.
• Paper: Paper is relatively soft and flexible. While it has some structure, it can be easily bent, folded, and torn, indicating it is not a hard material compared to others like wood or metal.
• Sponge: A sponge is known for being soft and highly compressible. Its structure contains many pores, making it very easy to squeeze and deform. Thus, sponge is a soft material.
• Table: A table is an object. Tables are typically made from materials such as wood, metal, plastic, or glass. These materials are generally hard compared to cotton, paper, or sponge. For instance, wood is much harder than cotton or paper, and metal is even harder. When asked which material is hard among the choices, "Table" refers implicitly to the common materials used to construct a table, which are hard in nature.

Conclusion on Material Hardness

Comparing the options, cotton, paper, and sponge are all considered soft materials. The material used to make a table, such as wood or metal, is significantly harder than these materials. Therefore, among the given choices, "Table" (representing its construction material) is the hardest.