The correct answer is option 'D', which states that cerebral hemispheres are the centers of thinking. Let's delve into the details to understand why this is the correct answer.

The cerebral hemispheres, also known as the cerebrum, are the largest part of the brain and are responsible for various higher cognitive functions, including thinking, reasoning, problem-solving, and decision-making. They are divided into two halves: the left hemisphere and the right hemisphere. Each hemisphere controls the opposite side of the body.

Thinking Process:
- The cerebral hemispheres play a crucial role in the thinking process. They receive and process information from various sensory organs, enabling us to perceive the world around us. This information is then analyzed, synthesized, and interpreted to form thoughts and ideas.
- The left hemisphere is primarily responsible for logical and analytical thinking. It deals with language, mathematics, and problem-solving. It helps us in reasoning, planning, and making rational decisions.
- The right hemisphere, on the other hand, is associated with creative and intuitive thinking. It is responsible for artistic abilities, imagination, and recognizing patterns. It helps us in understanding emotions, visualizing objects and scenarios, and expressing ourselves creatively.
- The two hemispheres work together in a coordinated manner, allowing us to think critically, creatively, and holistically.

Other Functions:
While the cerebral hemispheres are primarily associated with thinking, it is important to note that they are also involved in other functions. Some of these functions include:

1. Perception and Sensation: The cerebral hemispheres receive and process sensory information, allowing us to perceive the world through our senses. They interpret signals from the eyes, ears, skin, and other sensory organs, enabling us to see, hear, touch, taste, and smell.

2. Motor Control: The cerebral hemispheres are involved in controlling voluntary movements. They send signals to the muscles, enabling us to perform various actions like walking, talking, writing, and playing instruments.

3. Memory and Learning: The cerebral hemispheres play a crucial role in memory formation and learning. They help in storing information and retrieving it when needed. Different areas within the hemispheres are responsible for different types of memory, such as short-term memory and long-term memory.

4. Language Processing: While language processing is primarily associated with the left hemisphere, both hemispheres contribute to various aspects of language. The left hemisphere is responsible for language production and comprehension, while the right hemisphere assists in understanding non-literal language, gestures, and emotional aspects of communication.

In conclusion, the cerebral hemispheres are the centers of thinking. They are involved in various cognitive functions such as perception, sensation, motor control, memory, learning, and language processing. The left hemisphere is associated with logical thinking, while the right hemisphere is involved in creative thinking. The coordinated functioning of both hemispheres allows us to think critically, creatively, and holistically.