What is the average weight of the human brain?

The average weight of the human brain is approximately 3 pounds, making this the correct answer. This weight can vary slightly depending on factors such as age, sex, and individual anatomical differences. On average, the human brain accounts for about 2% of a person's total body weight, which reflects its importance in terms of function and energy consumption. It is critical for cognitive processes, sensory experiences, and motor function, all of which require a finely balanced structure that is relatively lightweight considering its complexity. The weights represented in the other options are typically higher than what is established through anatomical studies.