(a) Name the part of brain which controls
(i) voluntary action, (ii) involuntary action.
(b) What is the significance of the peripheral nervous system? Name the components of this nervous system and distinguish between the origin of the two.

Explanation

**Step-by-Step Solution:**

**(a)**
1. **Identify the part of the brain that controls voluntary actions:**
- The part of the brain responsible for controlling voluntary actions is the **Cerebellum**. The cerebellum plays a crucial role in coordinating voluntary movements, balance, and posture.

2. **Identify the part of the brain that controls involuntary actions:**
- The part of the brain that controls involuntary actions is the **Medulla**. The medulla regulates essential involuntary functions such as breathing, heart rate, and blood pressure.
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