Principles of Design

Contrast- Refers to the arrangement of     opposite elements     (light vs. dark colors, rough vs. smooth textures, large vs. small shapes, etc.) in a piece so as to create visual interest, excitement and drama.
It is showing contrast by having a red apple in a bunch of green apples.
From: Graphic Design Fundamentals
Balance- refers to the distribution of visual   weight   in a design.
It is the arrangement of items on the page so that one side is not weighted heavier than the other.
Balance is showing two side of a picture that can be split in half and still look the same.
From: SlideShare Blog
Unity/Proximity The relative closeness or separation between   objects   that reflects an assumed relationship between those objects is proximity.
This is showing Unity/Proximity because it is showing closeness of objects.
From: Graphic Designer in Kenya
Alignment (like the name suggests) is all about   organizing   elements relative to a line or margin.
Alignment is showing that two things are aligning together.
From: Pinterest
From: Designorate Repetition is simply the process of   repeating   elements throughout a design
Keeping design uniformity with text, picture elements, and design styles allows the viewer to flow easily through your designs. 
Repetition is showing multiple things being repeating.
From: Designorate
In terms of art, white space can be referred to as   negative space  . It is the portion of a page left unmarked.
Its showing the company in white space simply.
From: The Visual Representation Guy In terms of art, white space can be referred to as   negative space  . It is the portion of a page left unmarked.
Its showing the company in white space simply.
From: The Visual Representation Guy
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