Timeless

What makes a photo memorable or timeless? I am certainly not a fantastic photographer. I just try to capture moments that mean something to me
But I think if a photo is truly timeless, it would stand the test of time. If someone were to look at this photo a hundred years from now, what would the image say? Does the picture tell the story or is it just a random shot with no meaning? Moira loves to throw the ball for Fiona to retrieve in the pool and Fiona loves to retrieve the ball. I hope this photo captured the anticipation from both of them for this act. For me, every time I look at this photo I will remember a treasured moment.