All of these are really nicely spotted scenes, and all your photos here are very well composed. I like them all.
The lone mother with the plastic buckets but the child gone to play elsewhere made me think most.
But I also like the repetitive element of the railings in 2 and the calmness and simplicity of your composition in 3. Nice, quiet, almost empty winter day on the beach. The colour splash of the kite is a nice contrast to the otherwise very muted colours.