Concept:Arranging jumbled parts to form a grammatically correct and meaningful sentence.
Explanation:Part Q 'Our beautiful riverine ecosystem' is the subject, so it begins the sentence.
Part P 'is being systematically damaged' follows naturally as the verb phrase.
Part R 'by industrial pollution' explains the cause of the damage.
Part S 'channelled into rivers' completes the idea by describing how the pollution reaches the ecosystem.
Thus the correct order is Q, P, R, S, which corresponds to option (c) QPRS.
Answer:Option (c) QPRS – "Our beautiful riverine ecosystem is being systematically damaged by industrial pollution channelled into rivers."