A lot of things are necessary to make sure your work won't be seen as plagiarism. For example it is useful to keep research notes that show your work flow. If you do use other sources, make sure to cite them and especially If you quote them make sure you use citation marks and give the source.
Answer:
The Emancipation Proclamation was an executive order issued by Abraham Lincoln on January 1, 1863. It proclaimed the freedom of slaves in the ten Confederate states still in rebellion. It also decreed that freed slaves could be enlisted in the Union Army, thereby increasing the Union's available manpower.
Explanation:
The Emancipation Proclamation, implemented by President Abe Lincoln, took effective as of January 1, 1863. Lincoln's decision to use this proclamation came after the Union troops stopped the further invasion of the North by the Confederate troops.
B. The Colosseum is the Roman structure in the picture.