What effect can a defective steering shock absorber have on road behaviour?

You answered correctly. A defective steering shock absorber can cause the steering wheel to shimmy, which means it might vibrate or shake while driving. It also leads to a general deterioration in the vehicle’s roadworthiness—your car may handle less predictably, especially over bumps or uneven surfaces. Roadworthiness is not only affected at low speeds but at all speeds, so the third answer would be incorrect. In short, a defective steering shock absorber compromises your control over the vehicle and overall driving safety. Being aware of this helps you recognize early signs and maintain your car for safe road behavior.