Final answer:
The body of an essay provides detailed support for the central ideas and strengthens the thesis with evidence and analysis.
Step-by-step explanation:
The organizational part of an essay that provides details to support the central ideas is the body. The body is comprised of multiple paragraphs where each one develops a main point that supports the thesis statement.
In the body, sufficient evidence, detailed analysis, and appropriate transitions are used to articulate and bolster the essay's arguments and to reinforce the strength of the thesis.
For a well-structured essay, each paragraph in the body should be clearly connected to the essay's central argument, providing specific, concrete details that create a strong and complete support structure.