Correct option is C
The correct order of the given sentences is: b → a → d → c
Explanation of the correct sequence:
(b) "In order for life to be liveable," → The sentence starts with a general condition about life.
(a) "it requires constant sustenance" → Explains what life needs to remain liveable.
(d) "and favourable circumstances" → Adds another necessary condition.
(c) "that enable it to grow and develop" → Concludes by explaining the importance of sustenance and circumstances.
Thus, the correct sentence is:
"In order for life to be liveable, it requires constant sustenance and favourable circumstances that enable it to grow and develop."