The correct answer is option 1: Platelets. Platelets, also called thrombocytes, are tiny disc-shaped cells found in the blood. They play a crucial role in the process of blood clotting or coagulation. When there is an injury or damage to blood vessels, platelets are activated and adhere to the site to form a plug. They release chemicals that attract more platelets, causing them to stick together and form a clot. This clotting process helps stop bleeding and promotes wound healing. Red blood corpuscles, also known as red blood cells or erythrocytes, are responsible for carrying oxygen to different parts of the body. White blood corpuscles, also known as white blood cells or leukocytes, are involved in the immune response and fighting infections. Lymphocytes are a type of white blood cells that are important for the adaptive immune system. They are responsible for recognizing and attacking specific pathogens. Therefore, option 1 - Platelets - is the correct answer.