The Freedmen' s Bureau was established to help protect the right of African Americans.
They were similar because with olfactory lethargy you have a delay in detecting a new smell because your receptors are overworked from a previously heavy smell, the same thing appear with afterimage, you stare at a color and your cones become lethargy, thus showing an afterimage of another color. they were contrasting because one deals with olfactory bulbs and the other deals with occipital lobes and optic nerves.
The correct answer is A. Organizing Roman history into 3 main eras
Explanation:
Periodization in history refers to the process of studying and categorizing events of the past in to block of time. This process is aimed at facilitating the analysis of historical events and understanding the causes of specific historical processes. Additionally, periodization is useful as blocks of time are organized according to relatively common characteristics. Considering periodization is applied when categorizing or organizing events of the past, it can be applied to Roman history which result could be 3 main eras with common historical features. Thus, periodization is useful in the case of organizing Roman History.