According to the passage, a major difference between the colonization policy of the United States and that of Mexico in Texas in the 1800’s was the

treatment of the native inhabitants

Explanation:

The Mexicans followed the policy of acculturation with the native Indian tribes. It resulted in cultural assimilation of the Indigenous Indian tribes and this resulted in the introduction of the Indian tribes into the Mexican government. However, the policy of the United Staes was different as the settlers from the country craved new land for cotton production. They force the native tribes and took their land. When the conflict became severe they used force and ultimately win the territory.

the passage of a strict fugitive slave law

the spanish  

hope this meaning spain btw