Are most effective when information is kept to a minimum

   Visual aids are most effective when information is kept to a minimum.

Explanation:  Visual aids are basically any visual objects that can complement some given or delivered information. Also, visual aids can also be used in learning, i.e. information transfer to students. According to psychologists, visual representations, i.e images are those information that the human brain first registers and creates an impression based on them, after that based on written information, sound, etc. Visual aids contribute to the students' retention of  the displayed information, much easier than the written  information.

alone =having no one else present.

- "a.) it includes letters and books gathered over 1200 years, and consists of two parts.

- most of the new testament is letters from paul to the different churches, and since there's a new testament that means there is an old testament. "