Addie, if you would like to send me the original image via email I could help you better. Unfortunately all of the image information (EXIF) has been removed and validation will be very limited AKA assumption. I'll PM you my email address if you wish further analysis.
From what I can gather from the file name, the image was originally created with a Nikon camera. Typically DSC files point to a Nikon Disc Identification file.
Here's my assumption from the viewing. Again, having the file properties fully intact and unaltered would offer a more definitive deduction.
If your camera was set to program or auto mode, the camera would have struggled using nothing but ambient light and would have dragged the shutter. It's fairly evident, the suns position in the sky would have shielded the camera and subsequently required more time for a proper exposure to be made. There doesn't appear to be a catchlight present in the eyes of either of the two girls. If an onboard flash would have been used, the action would be frozen as the flash essentially becomes the shutter speed. Flashes fire approximately from 1/400 second at full power to 1/8000 second at the lowest. That's more than enough to freeze action.
Creating a sharp shot with nothing but ambient light without blur is dependent on the size of the object, distance fromn the lens and focal length and speed of the movement. In general terms your shutter speed needs to be the reverse reciprocal of the focal length. Example 50 mm lens = 1/50 second minimum. If you are using a crop sensor camera with a 1.5x factor = 1/80 second minimum.
I don't know many kids that can sit still when they are shot. I've done my share of children photography to understand that.
With the conditions you have presented, motion blur is most likely the culprit of this enigma. In auto/program mode, the shutter would have been dragged. In those modes, the F-Stop, shutter speed and ISO would have been set by the camera. That doesn't always reflect the vision of the photographer. With a combination of camera movement by the photographer and your subject matter failing to sit still, blur would have been introduced into the image.
I'll PM you if you want the EXIF data verfied from my deductions.
Edited by EVP, 22 October 2018 - 06:23 PM.