What is one of the main differences between Type 1 and Type 2 diabetes?

Type 1 diabetes is primarily characterized by the body's immune system attacking and destroying the insulin-producing beta cells in the pancreas, which results in little to no insulin production. This is a critical distinction from Type 2 diabetes, where the body generally produces insulin but is resistant to its effects. In Type 1 diabetes, the absence of insulin production leads to high blood sugar levels, requiring patients to take insulin externally to manage their condition.

The other statements do not accurately reflect the characteristics of the diabetes types. Type 2 diabetes is not primarily due to a total lack of insulin production, as some insulin is typically present, but the body's cells do not respond effectively to it. Additionally, Type 1 diabetes can occur at any age, though it is often diagnosed in children and young adults. Therefore, the key characteristic of Type 1 diabetes being the complete lack of insulin production, as indicated in the correct answer, highlights the fundamental pathology of the condition.