Question

Frank wrote several statements to summarize the relationship between the first and second laws of thermodynamics.

Answer 1

The second law of thermodynamics states that the total entropy of a system does not decrease with time. This is because not all heat can be converted into useful work. Therefore, the best option is the 2nd choice.
The other choices relate to conservation of energy and the first law of thermodynamics.

Answer 2

First law is Conservation of Energy

Second is that entropy of an isolated system will always increase with time.

Entropy is the change of disorder through time. The best statement which relates to the 2nd law is C. Thermal energy flows from areas of higher to lower temperature