Which of the following is a key service provided by the Red Cross?

The key service provided by the Red Cross that stands out is blood donation and transfusion services. The organization plays a crucial role in ensuring a safe and adequate blood supply for medical needs. This includes collecting, testing, processing, and distributing blood and its components to hospitals and clinics, which is vital for surgeries, trauma care, and treating various medical conditions. The Red Cross has established a network of donors and works tirelessly to promote blood donation, emphasizing its importance within communities.

Other services such as food distribution, clothing drives, and legal aid for refugees, while important, do not capture the primary focus and long-standing commitment of the Red Cross. Blood donation and transfusion services are integral to their mission and distinguish the organization in its humanitarian efforts.