I believe the answer is: 3. The canals and temples in the city show advanced engineering skills.
The site shows that the Aztec civilization had developed a very advanced irrigation system that utilize different elevation to obtain water for their agricultural field. Their system was later adopted by the spanish empire who invaded their territory.
Answer:
The President of the United States is the head of the executive branch.
Explanation:
The President gets help from the Vice President, department heads (called Cabinet members), and heads of independent agencies.
Answer: The Emancipation Proclamation and Thirteenth Amendment brought about by the Civil War were important milestones in the long process of ending legal slavery in the United States. This essay describes the development of those documents through various drafts by Lincoln and others and shows both the evolution of Abraham Lincoln’s thinking and his efforts to operate within the constitutional boundaries of the presidency.
Explanation: Events early in the war quickly forced Northern authorities to address the issue of emancipation. In May 1861, just a month into the war, three slaves (Frank Baker, Shepard Mallory, and James Townsend) owned by Confederate Colonel Charles K. Mallory escaped from Hampton, Virginia, where they had been put to work on behalf of the Confederacy, and sought protection within Union-held Fortress Monroe before their owner sent them further south. When Col. Mallory demanded their return under the Fugitive Slave Law, Union General Benjamin F. Butler instead appropriated the fugitives and their valuable labor as "contraband of war." The Lincoln administration approved Butler's action, and soon other fugitive slaves (often referred to as contrabands) sought freedom behind Union lines
