Differentiate between the following pairs on the basis of what is mentioned in brackets :
Diabetes mellitus and Diabetes insipidus (reason/cause)

Explanation

### Step-by-Step Solution:

1. **Definition of Diabetes Mellitus**:
- Diabetes mellitus is a metabolic disorder characterized by high blood sugar levels over a prolonged period. It is primarily caused by the body's inability to produce enough insulin or effectively use the insulin it produces.

2. **Definition of Diabetes Insipidus**:
- Diabetes insipidus is a condition characterized by excessive thirst and the excretion of large amounts of severely diluted urine. It is caused by a deficiency of the antidiuretic hormone (ADH), which is responsible for regulating water balance in the body.

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