Explanation: The resistance of a conductor is determined by several physical properties. **Cross-sectional area:** A larger cross-sectional area provides more pathways for electrons to flow, effectively reducing the resistance. Think of it like a wider pipe allowing more water to pass through. Conversely, a thinner wire (smaller area) has higher resistance. **Length:** The longer a conductor, the more "obstacles" electrons encounter as they travel from one end to the other, leading to increased resistance. A shorter wire offers less resistance. **Temperature:** For most conductive materials used in electronics (like copper), an increase in temperature causes the atoms within the material to vibrate more vigorously. These increased vibrations impede the flow of electrons, resulting in higher resistance. Conversely, lower temperatures typically lead to lower resistance. Since all three factors individually influence a conductor's resistance, "All of the above" is the comprehensive answer.