How was this photo taken?

There are two conditions for taking this photo:

1, its own lighting conditions, it is in the Woods, in the shadow, but there is a beam of light just shining on this little seedling.

2. The exposure of the camera is selected according to the brightest small blade. You move the camera to the blade so that it occupies the whole width (or most of it). At this time, if there is AE lock and you want to blur the background, you can increase the aperture appropriately. Do it.

As for post-production, don't think about it when taking pictures. Because PS is considered when taking pictures, you can never take good pictures.