Final answer:
The majority of each body paragraph in an essay should be dedicated to commentary and analysis, where the evidence presented is explained and connected to the thesis.
Step-by-step explanation:
The portion of an essay that should make up the majority of each body paragraph, and allow you to explain why each piece of evidence matters is the commentary and analysis. This is because each body paragraph typically follows the structure of point, evidence, and analysis. The analysis part is where you explain how the evidence supports the point made and relates to the thesis. This part can include interpretation of evidence, relating it back to the author's argument, and explaining the significance of the evidence within the context of the paragraph and the essay as a whole.