Natosha wants to create her own electromagnet that can pick up small pieces of metal like paper, clips or iron fillings which list of materials with Natasha need to build her electromagnet? A. String battery iron nail.B. Battery iron nail wire.C. Glass rod wire battery.D. Rubber band string battery.

Natosha will need an electric current and a ferromagnetic core to create an electromagnet. The best choice from the provided options that includes materials for a basic electromagnet is:

B. Battery, iron nail, wire.

Here’s why these materials are needed:

- **Battery**: This will provide the electric current needed to magnetize the iron nail when the wire is wrapped around it and connected to the battery.
- **Iron nail**: The iron nail serves as the core of the electromagnet. Iron is a ferromagnetic material, which means it can be magnetized.
- **Wire**: The wire is needed to wrap around the iron nail. When an electric current flows through the wire, it creates a magnetic field around the nail, turning it into an electromagnet.

To assemble the electromagnet, Natosha would wrap the wire around the iron nail, making sure to leave enough wire free on each end to connect to the battery terminals. Once the wire is connected to the battery, an electric current will flow and magnetize the nail. Natosha should be cautious to avoid overheating the wire or battery, and the electromagnet should be used under supervision, especially if the creation is a learning project for a child.