Group 1 consists of 10 members from Poland, Spain and Germany: Anna Woszczyk, Maja Gewald, Natalia Baczewska from Poland; Noelia Afonso Martín, Gorka Arnay Esteban, María Samara Ascanio Castro, Lucía Castañeda Benites, Andrea Candelaria Domínguez Medina, Adil José El Founti Afonso from Spain; and Philip from Germany. The document discusses how water is essential for the human body's processes and functioning, and deficiencies can affect organs and appearance; therefore, maintaining proper hydration is important, as a lack of water can lead to dangerous dehydration for both children and adults.