Final answer:
The correct answer is B. A nut. A nut is the item that can attach to a bolt, creating a secure fit by the matching of the bolt's external threads with the internal threads of the nut.
Step-by-step explanation:
The item that can attach to a bolt is B. A nut. A bolt is a type of fastener that is paired with a nut to join two or more parts together. The bolt has external threads that are matched by the internal threads of the nut, creating a secure fit when the nut is twisted onto the bolt. Nuts and bolts are commonly used in various applications, including machinery, vehicles, structures, and furniture. While there are other items such as a cap or a disc that might be associated with bolts in different contexts, a nut is specifically designed to fasten onto the threading of a bolt.
For example, imagine you have a bolt with a thread and a nut with internal threads. By twisting the nut onto the bolt, the threads on both the bolt and the nut interlock, providing a secure attachment. This is commonly used in various applications, such as construction, mechanics, and other industries where fastening and joining components is necessary.
Therefore, in the context of physics and mechanical applications, a nut is the most appropriate object that can attach to a bolt.