To accurately determine which factor contributed to the trend illustrated in the graph, I would need access to the specific graph or data you are referring to, along with its context.
However, if the trend relates to industrial growth or expansion in manufacturing, the following contributions can be inferred:
- The growing profitability of textile production could indicate increased demand or advancements in production techniques.
- The completion of the transcontinental railroad would have facilitated movement of goods and resources across the country, which could significantly boost industry.
- The massive influx of immigrants from Europe provided a labor force that fueled industrial growth and expansion, particularly in factories.
- The implementation of the Bessemer process revolutionized steel production, allowing for more efficient and cheaper production, impacting various industries.
If you can provide more context about the trend or the type of data presented in the graph, I can help you determine the most likely contributor.