In 1870, galveston thrives as a city because of which industry?

In 1870, Galveston thrives as a city because of cotton industry.

Explanation:

The city became one of the nation's busiest ports and the world's leading port for cotton exports. Galveston became Texas' largest city and, during that era, was its prime commercial center. In 1900, the island was struck by a devastating hurricane. Even post-Hurricane Katrina, this event holds the record as the United States' deadliest natural disaster.

The American settlers quickly introduced the slave-based cotton-plantation system, expanded commercial livestock production, and developed concentrations of small, non  slave holding family farms. The large influx of Anglo-American settlers led to the Texas revolt, the independence of Texas, and the subsequent war between the United States and Mexico, followed by the admission of Texas into the Union.

As time passed the essentially pastoral character of Texas agriculture became more heavily a plow and commercial system.

arms and plantations primarily utilized teams of oxen for plowing, and occasionally horses or mules. Mules became much more prevalent after the Civil War. Plows were fabricated locally, or, when cash was available, farmers might import farm equipment such as the Eagle plow through New Orleans and Galveston. Commerce generally depended on wagons to and from the port of Galveston; some produce was floated down the rivers. Although steamboat transportation and railroad construction began in Texas before the Civil War, river steamer and rail transportation were generally postwar developments.

After the war the traditional cotton plantation system continued, but with tenant farmers in place of slaves.