The 9th Amendment states that: "The enumeration in the Constitution, of certain rights, shall not be construed to deny or disparage others retained by the people."
It is, in effect, that even there are rights other than just the ones listed in the Bill of Rights and they can't be violated either.
Actually most of those illegals take jobs that the average american person finds disgusting.
Answer:
Import and export.
Explanation:
trade and import goods from other areas, and sell products that they export out of the country.