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Discussion

Match each instrument with its role in a seeding programme.
List I
A. Microwave radiometer
B. Weather radar
C. Trace chemical analysis
D. Precipitation gauge network
List II
1. confirming the agent reached the target
2. measuring supercooled liquid water path
3. measuring the resulting surface fall
4. detecting ice produced in the seeded plume

  • A.A-3, B-1, C-4, D-2
  • B.A-2, B-4, C-1, D-3
  • C.A-4, B-2, C-1, D-3
  • D.A-2, B-4, C-3, D-1

Answer: B

Together these address different links in the causal chain from release to rainfall. A programme lacking any of them leaves a corresponding gap in the evidence it can offer. Each instrument addresses a different causal link.

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