Lightning conductors use low-resistance metals for safe current flow

Steps:

• Lightning delivers high current; conductors must handle it without damage.
• Metals like copper have low electrical resistance, allowing easy electron flow.
• Low resistance minimizes heat buildup via Joule's law (P = I²R).
• Copper safely directs charge to ground, protecting the building.

Why C is correct:

• Low resistance enables high currents to flow with minimal opposition, per Ohm's law (V = IR), preventing overheating or melting.

Why the others are wrong:

• A: All conductors allow both charge types; this isn't unique to copper.
• B: Charging isn't the goal; conduction to ground is.
• D: Heat conduction matters but secondary to electrical resistance for current handling.

Final answer: C