which of the following letter formats uses indented paragraphs?\na full block letter\na modified block…

Brief Explanations:

In a semi - block letter format, the body paragraphs are indented. A full block letter has all elements aligned to the left margin with no indents. A modified block letter has the date, closing, and signature line indented but not the body paragraphs. A simplified letter also has no indented paragraphs.

Answer:

C. A semi - block letter