Which of the phrases (1), (2), (3), (4) and (5) given below each statement…

Correct completion: In the hard work of going out to communities, mapping exclusions, and building systems that account for this.

Explanation:

• Grammatical fit: The phrase is a prepositional phrase that completes 'the answer is ...' naturally (the answer is in the hard work of ...).

• Semantic fit: It contrasts with seeking a quick technical 'silver bullet' by locating the solution in sustained, practical community engagement and system-building.

Why the other options fail:

• Also critical to building capacities in people, civil society and the government to understand. — This is a fragment that begins with 'Also' and yields an awkward or ungrammatical completion; it does not logically answer where the solution lies.

• Biometric identities can play a significant role in moving the debate forward on this. — This is an independent clause that would need a connector ('that') to fit grammatically, and its content does not directly counter the idea of false reliance on complicated data.

• Migratory nature of informal settlements is hard to capture. — This standalone statement would be ungrammatical as a direct completion and is unrelated to the intended contrast in the stem.

Conclusion: The phrase 'In the hard work of going out to communities, mapping exclusions, and building systems that account for this.' both grammatically completes the sentence and provides the intended contrast to relying on 'silver bullet' solutions.