The most primitive part of the brain is the:Question 6Answera.midbrain.b.forebrain.c.cortex.d.hindbrain.

The most primitive part of the brain is the hindbrain (option d).

Here's why:

1. The brain can be divided into three main parts: the forebrain, midbrain, and hindbrain.

2. The hindbrain, also known as the reptilian complex, is the oldest and most primitive part of the brain. It includes structures such as the medulla, pons, and cerebellum.

3. These structures are responsible for basic survival functions such as heart rate, breathing, and balance.

4. The midbrain and forebrain, on the other hand, are responsible for more complex functions such as processing sensory information and higher cognitive functions.

5. Therefore, the most primitive part of the brain is the hindbrain.