Find THE ODD ONE OUT | Spot which one does not belong to the group

Hello quizzers! Test your skills in determining which the odd one is. This is composed of 4 levels each one with different category. You have ample time to guess but if the time is not enough, you can always PAUSE the video.

Level 1: Find out which one is different in color
Level 2: Similar items are in one slide with the exception of one slightly different from the rest.
Level 3: Different items but with 1 common characteristic except for one. Find out which one it is. Keen observation is needed.
Level 4: Same as level 3 but instead of observation, your logic is needed. Think what characteristic is common and pick the one that does not belong to the group.