Basic photography

We have been seeing some videos about basic photography concepts and here there are some pictures showing the "Depth of Field" and "shutter speed" concepts:

As you can see, here the camera allowed me to focus on my hand instead of focusing on both the hand and the trees behind. This would be an example of depth of field concept.

Here the hand appears blured because the mobile phone camera shutter speed, in fact, the hand was moving so my mobile phone camera couldn't take a properly picture. The are cameras which have a high shutter speed so even if the hand was moving, the camera would take it focused.