The zeroth law of thermodynamics pertains to thermal equilibrium.
The first law of thermodynamics talks about the components of internal energy is heat and work. Hence, the change in heat and work, in and out of the system affects the internal energy of the system.
The third law then states that when the temperature of a system approaches absolute zero (zero Kelvin), the entropy also approaches a constant value.
The answer is 2nd. The statement is a description of the second law of thermodynamics.
