To address the challenge of climate change, developing countries urgently…

Concept:

A passage-based question is settled by what the passage itself asserts, not by what sounds sensible about the world in general. The dependable method is signal matching: take the marker carried by the question — here the idea of urgency — and find the sentence in the passage that carries the same marker. Whatever that sentence prescribes is the answer, and any option that is merely plausible has no standing against it.

Application:

1. The question asks what developing countries urgently require. So the search key inside the passage is its own statement of urgency, not its general discussion of adaptation.

2. The passage carries that marker in exactly one place: "Because of the speed at which climate change is happening due to global temperature rise, it is urgent that the vulnerability of developing countries to climate change is reduced and their capacity to adapt is increased and national adaptation plans are implemented."

3. That sentence is addressed to developing countries by name and names three linked requirements: reduce their vulnerability, increase their capacity to adapt, and implement national adaptation plans.

4. Reducing vulnerability and increasing adaptive capacity are outcomes; the one requirement stated as an action the countries themselves carry out is the implementation of national adaptation plans — that is, the implementation of national adaptation policy at their level.

Cross-check against the other values:

• "Imposition of climate change tax" — the passage sets out its adaptation measures as sea defences, flood-proof housing, reduced water use, early warning systems, better water management, improved risk management, insurance options and biodiversity conservation. No fiscal or taxation instrument appears anywhere in it.

• "Adoption of short-term plans" — the passage asks communities to build resilience against "current and future climate stress" and to make adjustments "at every level from community to national and international". Its horizon is wider and more permanent than a short-term plan.

• "Adoption of technological solutions" — technology is present in the passage ("increased sea defences or flood-proof houses on stilts"), but as one item in a range that also includes behavioural change, traditional knowledge and diversified livelihoods. The passage never singles it out as what is urgent for developing countries.

Hence, on the passage’s own statement, what developing countries urgently require is the implementation of national adaptation policy at their level.