Cohesion refers to the way different parts of a substance stick together, creating a unified whole. This property is particularly important in liquids, where molecules are attracted to each other, allowing them to form droplets. For example, water exhibits strong cohesion due to hydrogen bonds between its molecules, which helps it maintain its shape and resist external forces. In a broader context, cohesion can also describe the unity and connection within groups or communities. When individuals work together harmoniously, they create a cohesive team that can achieve common goals. This social cohesion is essential for effective collaboration and communication among members of any group, such as families, organizations, or nations.