Fill in the blanks with suitable words. Water is one (a) — the most important natural resources. Life cannot exist (b) — water. We use water (c) — drinking, cooking, and cleaning. Rivers and ponds provide water (d) — us. But water pollution is now a serious concern. Many people throw waste (e) — rivers and canals. This makes water unsafe (f) — use. Government must take steps (g) — stop this pollution. Citizens should also avoid polluting water (h) — they depend on it. We must save water not only (i) — ourselves but also (j) — future generations.