What are some reasons given by the Texas Secession Convention for leaving the Union?

Texas Secession Convention  sought for leaving the Union after the election of Republican whose election rules and promises were unacceptable to them.

Explanation:

The Texas Secession Convention decision that was fateful in 1860 and was one that decided in favor for leaving the Union was made shortly after it was decided that the Republicans who would form the government.

The main reasons of the secession were:

i think the answer is c, rivers.

explanation:

sometimes, borders fall along natural boundaries like rivers or mountain ranges. for example, the boundary between france and spain follows the crest of the pyrenees mountains. for part of its length, the boundary between the united states and mexico follows a river called the rio grande. the borders of four countries divide africa’s lake chad: niger, chad, cameroon, and nigeria.

some american cities felt workers were being oppressed by business monopolies