Atype of essay development that seeds to readers better understand concepts and issues by looking at their similarities and differences is called

It is called comparison/contrast essay. 
Here are some useful tips:
A comparison essay notes either similarities or similarities and differences.• A contrast essay notes only differences.• The comparison or contrast should make a point or serve a purpose. Often such essays do one ofthe following:Clarify something unknown or not well understood.Lead to a fresh insight or new way of viewing something.Bring one or both of the subjects into sharper focus.Show that one subject is better than the other.• The thesis can present the subjects and indicate whether they will be compared, contrasted, or both.• The same points should be discussed for both subjects; it is not necessary, however, to give bothsubjects the same degree of development.• Some common organizational structures include: (see note below)Block method (subject by subject)Point by pointComparisons followed by contrasts (or the reverse)• Use detailed topic sentences and the following connecting words 
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