A) Gold, Coal and Copper
B) Mars
C) None of these
D) Iron, Nickel and Cobalt
🧠 Explanation:
Iron, nickel, and cobalt are magnetic materials used in technology. Knowing this helps students and science enthusiasts understand magnetism. These materials are key for studying physics or engineering in school. Learning this helps with science projects or exploring magnets. It’s useful for science classes, making it relevant for understanding electromagnetism. Knowing these materials helps students grasp their applications, ensuring better comprehension for academic work or general knowledge about magnetic technologies.
