Explanation:

- Q: Conservationists have the view that

This is a good starting point, introducing the subject and viewpoint.

- P: Development is necessary for a better future

This phrase logically follows, as it presents a general statement about development, which contrasts with the view of conservationists.

- S: But when the changes occur

This indicates a condition or contradiction, linking development and its implications.

- R: In ways that are not wasteful

This concludes the sentence, describing how changes should occur, aligning with both development and conservation.

- Option 1: RSPQ

This sequence is disjointed and does not form a coherent sentence.

- Option 2: QPSR

This sequence forms a clear and logical statement.

- Option 3: QRPS

This sequence starts well but ends with an incomplete thought.

- Option 4: QSPR

This sequence does not follow a natural flow.

Option 2: QPSR forms a coherent sentence: "Conservationists have the view that development is necessary for a better future, but when the changes occur in ways that are not wasteful."