He came to Bagerhat to preach Islam and to promote the plight of common people.

This is a complete and grammatically correct sentence intended to be part of a Jumbled Sentences rearrangement task.

For students preparing for the HSC English 1st Paper, "Jumbled Sentences" is a common question type that assesses their ability to create a coherent and logical paragraph from a set of disordered sentences. While this particular input provides only one sentence, "As Bagerhat is near the Bay of Bengal the water is usually saline," a full question would typically provide five to seven such sentences. The task requires understanding sentence functions (topic, supporting, concluding), identifying pronouns and conjunctions for linkage, and maintaining thematic consistency to reconstruct the original paragraph. This specific sentence provides factual information about Bagerhat's geographical location and its impact on water salinity, suggesting it would likely be a detail within a passage about Bagerhat's environment or characteristics.