🔍 Key Concepts

• Battery maintenance and corrosion prevention on terminals • Properties of common compounds used on metal surfaces • Why some substances insulate, some conduct, and some are corrosive

💭 Think About

• Think about which option is commonly available on boats and in auto stores for coating battery terminals. • Consider which substances might actually increase corrosion or create harmful chemical reactions with lead and acid. • Ask yourself which substance would form a thin, protective, water‑resistant film without reacting with the metal.

✅ Before You Answer

• Identify which choice is a non‑reactive, water‑repellent coating rather than a pigment or chemical compound. • Eliminate any substances that are typically used as paints, primers, or oxidizers rather than protective greases. • Check which substance you’ve actually seen recommended in basic battery-care instructions or manuals.