The correct answer is option (C):
RPQS
The correct answer is RPQS. Here's the breakdown of why:
The goal is to create a logical and coherent sentence or passage. Analyzing the fragments:
* R: "The bacteria help in decomposing..." This is a good starting point because it introduces a subject (bacteria) and a verb (decomposing) suggesting a process.
* P: "...The dead bodies of plants and animals..." This logically follows R, specifying *what* is being decomposed (the dead bodies).
* Q: "...And clean the environment..." This is a consequence or a benefit of the decomposition process, tying the action back to the overall impact.
* S: "...And deposit back useful elements into soil, air and water" This further clarifies *how* the environment is cleaned, describing what the bacteria actually *do* with the decomposed materials.
Putting it together:
"The bacteria help in decomposing the dead bodies of plants and animals and deposit back useful elements into soil, air and water and clean the environment."
This reconstructed sequence, though slightly redundant with "and", provides a clear and understandable explanation of the role of bacteria in the environment.
Other options don't make logical sense:
* SPQR: Doesn't make sense as it starts with "The dead bodies..." without any explanation of what happens to them.
* PQRS: This is also illogical as it begins by stating what the dead bodies are and then moves to a benefit of the process.
* SRQP: Doesn't follow a logical order.
* PRQS: Does not create a sensible sequence.