Final answer:
The etiology of type 1 diabetes is the destruction of special cells in the pancreas that produce insulin, leading to high blood sugar levels.
Step-by-step explanation:
The nurse should describe process D) "Destruction of special cells in the pancreas causes a decrease in insulin production. Glucose levels rise because insulin normally breaks it down." when explaining the etiology of type 1 diabetes to the newly admitted patient. Type 1 diabetes is an autoimmune condition in which the immune system mistakenly attacks and destroys the beta cells in the pancreas that produce insulin. Without enough insulin, glucose cannot be effectively broken down, leading to high blood sugar levels.