Answer: Vanqueros have been driving and herding Wild Horses and cattle for many years by the time they were part of the Texas ranching landscape,. They've also had a heavy influence on American cowboys and their Clothing.
The answer is Human
While the other options are always affecting the ecosystems, humans have a greater affect than all of the above
I would say upper class. Both parents seem to have high paying jobs and in my mind wouldn't struggle to provide for their children's educational needs. Where as if they were upper-middle class they might struggle to pay for private schools and college.
The answer: nature vs nurture
