To form a meaningful sentence, the parts must logically connect. Starting with b, "in order for life to be liveable," sets the condition. Then, a, "it requires constant sustenance," specifies the requirement. Next, d, "and favourable circumstances," adds another requirement. Finally, c, "that enable it to grow and develop," describes the purpose of sustenance and circumstances.
The sentence becomes: "In order for life to be liveable, it requires constant sustenance and favourable circumstances that enable it to grow and develop."
Option 3 (b, a, d, c) is correct.
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