Final answer:
Stephen F. Austin settled between two rivers to provide fertile land, easy access to water, facilitate trade and transport, and potential defense for his first colony. The generous land terms offered by Mexico and the belief in 'Manifest Destiny' also played a role in attracting American settlers.
Step-by-step explanation:
Stephen F. Austin chose to settle his first colony between two major rivers. This location was strategically advantageous for several reasons. It offered a fertile environment for agriculture, essential for the settlers' sustenance and economic prosperity.
The rivers likely provided a reliable water source for farming, a necessary condition for the expansion of slavery and the cotton kingdom. Additionally, having a settlement between two rivers could facilitate trade and transportation, as rivers were primary avenues for these activities during the time.
The land in Texas was offered at generous terms, with the option to pay for land in installments without a minimum purchase requirement, which was unlike the U.S. government's stipulations. This made Texas an attractive destination for Americans, especially those from slave states.
Stephen F. Austin's settlement was in line with the beliefs of 'Manifest Destiny', the idea that White Americans were preordained to expand their culture and institutions across the continent. Choosing a location between two rivers also had the potential of offering a defensive advantage, a consideration that could not be ignored given the uncertain political climate.
With thousands of Americans flocking to Texas, outnumbering the native Tejano population, and ongoing tensions between the settlers and the Mexican government, this geographic feature could serve as a natural barrier against potential threats.