Here is a possible 10 mark response to the question: The need for water can create significant tension and conflict for several key reasons: Firstly, water is essential for life - it is needed for drinking, sanitation, agriculture and many other daily activities. Where water supplies are limited or uncertain, this puts pressure on access to the resource. Populations and their needs are growing, but water supplies are finite. This mismatch between demand and supply lays the foundations for potential disputes. Secondly, many of the world's major river basins and aquifers cross international borders, so water resources are often shared between countries. This can make management and allocation extremely challenging. Upstream countries may control flows downstream, and different priorities