Answer:
The text structure of the passage is:
C) Descriptive/Spatial
Step-by-step explanation:
In descriptive or spatial writing, we organize the information in order of space. For instance, from top to bottom, from the left to the right, etc. In other words, we describe something by the way it looks and by how the space is occupied by it. In the passage we are analyzing here, the author describes the human brain in a spatial manner. First, he/she mentions our brain is divided into two halves. Then, the author explains our brain can also be divided into three parts from front to back. He/She proceeds to describe each one of these parts.