Logo design involves logical, systematic method of graphics. It's can be be in form of text, images, or both. It can be in 2D or 3D form. Animations are methods of presentation cartoon characters. It can also be in 2D or 3D. It can be used on advertising, YouTube videos, presentation, explanation of some concept, can be used as intro and outros. Remove background simply means to get rid of unwanted images acting as the background of an object or group of object. General knowledge of graphics is used in posters, business cards, banners etc.