What does this type of text structure highlight?

sam houston basically made tx he fought for anrew lead troops in the battle of san jacinto and then became president and james polk

answer: in 1900, there were no "workplace safety laws"!

explanation: at the beginning of this century, workers in the united states faced remarkably high health and safety risks on the job.

a century ago in 1900 about three hundred out of every one hundred thousand miners were killed on the job each year.

[industria] developments occurred within a legal and regulatory climate that diminished employer’s interest in safety. as a result, americans developed production methods that were both highly productive and often very dangerous.

multiple choice? can i see the answers?

because they can and they wanted to.