Rivers are the backbone of human’s civilization. This chapter revolves around the impact of man’s activities on a river. It tells us how the river becomes polluted and measures that are to be taken to save the river. Also, the chapter tells us about the sea and why we can’t drink seawater. This chapter is about the importance of the river and its uses. And also explain kids the several purposes of water. It includes so many fun activities like rearranging the sentences, Q&A, Draws and name the things, completes these sentences, Looks at the pictures and mark them in the correct order, etc. All the study materials are in PDF format and easy to download.