What technique is being used for he would write but his hours are as busy as bees in the son, and why

This is an example of simile, a rhetorical device that compares two unlike things using "like" or "as"

Technical writing is simply a bit of practical information.

The technical writer is responsible for those texts or documents that must have several conditions: accuracy, comprehension, implementation, and comprehensiveness of the information available to the intended reader.

And help instructions (immediate assistance) as in computer programs that describe methods of implementation and operations. Here are the operating instructions manuals (or catalogs) such as the one you received when you purchased as well as: