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Rearrange the following phrases into a meaningful sentence. The beginning of the sentence has been given below. Read the options and find out which of the four combinations is correct:

The need for a scientific understanding....

(A) the Rio Earth Summit, the first of its kind

(B) Involving world leaders on environment and development

(C) of natural ecosystems including forests was the main objective of

(D) of phenomena like climate change, biodiversity, and conservation

Choose the correct answer from the option given below

Solution

✅ Correct Option: 3

Option 1: (C), (D), (A), (B) -> This creates "...of natural ecosystems...was the main objective of of phenomena..." which is grammatically incorrect with double "of".

Option 2: (B), (C), (D), (A) -> Starting with "Involving world leaders..." doesn't flow logically from "understanding" and breaks sentence structure.

Option 3: (D), (C), (A), (B) -> Creates "...understanding of phenomena like climate change, biodiversity, and conservation of natural ecosystems including forests was the main objective of the Rio Earth Summit, the first of its kind involving world leaders..." - flows smoothly and logically.

Option 4: (D), (B), (A), (C) -> Places "was the main objective" at the end, creating awkward sentence structure.


Hence, Option 3: (D), (C), (A), (B) -> This arrangement creates a grammatically correct and meaningful sentence that explains how the Rio Earth Summit aimed to foster scientific understanding of environmental phenomena and ecosystem conservation through bringing world leaders together -> correct

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