In a business letter,within the message,paragraphs are double-spaced with single-spacing between paragraphs.

Double-spaced

Refers to text formatting where there is a full blank line between each line of text, commonly used in document formatting for readability.

Single-spacing

A text formatting option where lines of text are positioned directly one after another, with minimal space in between.

Business Letter

A formal document used for communication between companies or between a company and its clients, suppliers, or other entities.