A. Graphite
B. Charcoal
C. Slate
D. Silicon
🧠 Explanation:
Graphite is used in normal pencils, not lead, despite the common term. A form of carbon, graphite’s layered structure allows smooth writing, leaving marks on paper. Discovered for pencils in the 16th century, it’s durable and erasable, ideal for writing and drawing. Understanding graphite’s role clarifies misconceptions about pencil composition, relevant in education and material science. Its use highlights the importance of simple materials in everyday tools, making it a key topic in studying the history and functionality of writing instruments across academic and practical contexts.
