To show emotion and communicate using a still image like maybe i can show the emotion of confusion by editing a picture to make it have question marks over my head or I could show the emotion of jealousy by showing a picture of me getting mad at some body that could of gotten a bigger piece of candy then i did.
The three skills that i found the most useful will taking my creating my pictures was the rule of thirds the filters that you can use in the photos app and being able to draw using the edit photos option.