Give one important use of each of the following :
Morphine

Explanation

### Step-by-Step Solution:

1. **Identify the Substance**: The question asks for an important use of morphine.

2. **Define Morphine**: Morphine is classified as a narcotic analgesic, which means it is a drug that is used to relieve pain. It is derived from opium and is known for its potent effects.

3. **Understand the Function**: As a narcotic analgesic, morphine works by binding to specific receptors in the brain and spinal cord, which helps to block the sensation of pain.

...