Hint: unprotected UF cable
See answer below.
The UF cable coming out of the ice-covered ground was used to provide temporary power to the holiday lights on this tree. Section 590.4(J) prohibits cable assemblies, flexible cords, and flexible cables from being laid on the ground or floor for temporary power purposes. The Exception in Sec. 590.4(J) would allow the cables to be run overhead and supported by this tree if strain-relief devices, tension take-up devices, or some other approved means was used to prevent tree movement from damaging the cables.
The installer of the UF cable also installed a cord cap on the UF cable as if making an extension cord. You may notice the string lights plugged into this cord cap. Using a cord cap, designed to be installed with flexible cables or flexible cords, on UF cable is a violation of Sec. 110.3(B) since the cord cap is not listed for this use.
The lack of protection for this UF cable is a violation of Sec. 590.4(H) since this cable could easily be accidentally damaged from people walking by and stepping on the cable.