Task: High contrast. It could be shape, color, texture, contents and so on. (Extra credit for mid-day sun light.)
While most photographers (and enthusiasts as well) would consider the lighting conditions when thinking of contrast, there are many other components that could qualify as extreme diversity. Think of a great-grandparent holding a baby. His or her great-grandchild. So I set out looking for not only one element, but how many I can include in a single image. Due to my limited time, I do not feel I was too successful, but I enjoyed the exercise.
Leica M with Summcron 90-mm at ISO 500 set to f 8 / 500 sec. Processed in LightRoom, Photoshop, Topaz