Answer: A secondary source of information is one that was created later by someone who did not experience first-hand or participate in the events or conditions you're researching.
Explanation:
The correct answer is - trade.
The Sumerians engaged in trade with their move of exchanging their surplus food for materials like the copper that they needed to develop their weapons and thus their army forces. This was a very smart move from their side because they managed to use the resource they had in abundance but was scarce in the other surrounding areas so that they take what they need to become stronger and pretty much defend more efficiently from the same people they were engaging in trade with.
It is important to know there are good and bad bacteria because we can assume that all bacteria is either bad or good, this way know there are both could help us understand in the future what to look out for.
Between the House and the Senate, the House of Representatives is more reflective of the population of the United States.
The United States House of Representatives is the lower chamber of the United States Congress, the Senate being the upper chamber. Together they comprise the legislature of the United States.
