The answer is water because today not everybody has gold or land or silver and everybody has water and til this day still uses it.
Language
Watch
Edit
The Law of April 6, 1830 was issued because of the Mier y Terán Report to counter concerns that Mexican Texas]], part of the border state of Coahuila y Tejas was in danger of being annexed by the United States. Immigration of United States citizens, some legal, most illegal, had begun to accelerate rapidly. The law specifically banned any additional American colonists from settling in Mexican Territory (which included both California and Texas, along with the areas that would become Arizona, parts of Colorado, Nevada, New Mexico, and Utah.) It also outlawed slavery in Texas.[1]
Https://www.coursehero.com/file/19108526/Untitled-documentdocx/
That is a URL to all the answers
Slave importation became illegal in 1808. It was not strongly enforced because about 250,000slaves were imported illegally before the Civil War. This was because plantations began to growand the need for slave increased.