nikitonsky: Rule of proximity: things that are close together are considered to be the part of the same group.
Squirrel looking into the lens of a camera (© Alfredo Piedrafita/Getty Images)
‘Avatar Mountains,’ Zhangjiajie National Forest Park, China (© Amazing Aerial Premium/Shutterstock)
Giant sequoia trees in Sequoia and Kings Canyon National Parks, California (© lucky-photographer/Getty Images)