Final answer:
The trend of westward movement, as indicated on the map, significantly contributed to Texas independence from Mexico (Option a).
Step-by-step explanation:
The movement of settlers into Texas from the United States was a pivotal factor in the tensions leading to the Texas Revolution and subsequent independence. The westward expansion of American settlers into Texas, seeking land and opportunities, escalated conflicts with Mexican authorities, ultimately leading to the Texas Declaration of Independence in 1836.
This movement represented a clash of cultures and interests, as Americans sought autonomy and self-governance, diverging from Mexican rule. The Battle of the Alamo and the decisive victory at San Jacinto further solidified Texas' quest for independence, eventually leading to its annexation by the United States.
The map illustrates the migration patterns and territorial expansion that fueled the conflict between Texas and Mexico, making Texas' fight for independence a direct outcome of the ongoing westward movement in American history.
Correct answer: a) Texas independence from Mexic