The question below consists of a set of labelled sentences. Out of four options given, select the most logical order of the sentences which forms a coherent paragraph.
We know that dogs are a human's best friend.
P They love us and we love them.
Q Although wolves are wild and dogs are tame, they're still a lot alike.
R Many scientists think they came from wolves 15,000 years ago.
S Both wag their tails when happy and put their tails between their legs when scared.
These similarities today depict the relationship which they built with humans over 15,000 years ago.

Correct option is B

Option (b) is the correct order of the given sentences.
The correct sequence is PRQS.
Explanation of correct sentence order:
· Sentence P introduces the idea of the close emotional bond between dogs and humans. This sets the tone for exploring why this bond might exist.
· Sentence R provides the historical background, explaining that dogs are believed to have evolved from wolves approximately 15,000 years ago — supporting the origin of this bond.
· Sentence Q then draws a comparison between wolves and dogs, pointing out that despite differences in domestication, they still share important similarities.
· Sentence S gives specific examples of those shared traits (tail wagging when happy, tucking tail when scared), reinforcing the connection discussed in Q.
Together, the PRQS sequence builds a cohesive and chronological flow: emotional bond → historical origin → similarity → evidence of similarity.