Final answer:
The biggest construction project in the Western world in the last 4,000 years is the 3: The Great Wall of China
Step-by-step explanation:
In episode 4, referring to the biggest construction project in the western world in the last 4,000 years, the correct answer is Option 3: The Great Wall of China. The Great Wall of China is an extensive fortification system that spans over 13,000 miles, largely built during the Ming Dynasty which ruled from time perido of 1368-1644.
Its construction involved millions of people and took several centuries to complete, making it by far the largest construction endeavor in the history of the western world. The other options, namely the Hoover Dam, Panama Canal, and Golden Gate Bridge, while significant achievements, do not match the scale and duration of the Great Wall's construction.