Read the following passage: 'A recent study published in the Journal of Environmental Science highlights the critical role of wetlands in purifying water. These ecosystems act as natural filters, removing pollutants and excess nutrients before water flows into larger bodies. Their preservation is essential for maintaining freshwater quality worldwide.' What is the author's primary purpose in this passage?
✓ Correct Answer: Option B
The author presents factual information from a study to explain the function and significance of wetlands. The language is objective and aims to educate the reader, not to persuade, entertain, or criticize directly.