Answer:
A report
Step-by-step explanation:
As stated in the question above, the military general was sent to inspect the growth of Texas's population. This general, observed the population rates that Texas presented and wrote a report with the observations that he made, sending to the Mexican government, so that they had access to the information they needed.
A report is a document that contains a set of information that reveals the result of an investigation, project or observation. it is written to show the results of the established activity.