Moving
https://freesound.org/people/Lukeo135/sounds/540728/(step on sand) Choice A
https://freesound.org/people/wyronroberth/sounds/516247/ (only 1 step on sand) Choice BWater ambience
https://freesound.org/people/InspectorJ/sounds/339324/ Choice A
Water ambience II !
https://freesound.org/people/courter/sounds/449826/ Choice B