Final answer:
Four-wheel-drive systems provide traction on slippery surfaces, do not eliminate the need for snow tires, and ensure effective transmission of engine torque on slippery roads.
Explanation:
Correctly describe the features of a 4WD system:
- Friction: Four-wheel-drive provides traction on slippery surfaces because if some wheels slip, others can still have traction.
- No Need for Snow Tires: While 4WD helps on snow, it doesn't eliminate the need for specialized tires or chains.
- Transmission of Engine Torque: 4WD ensures effective transmission of engine torque on slippery roads.
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