Correct Answer: Stay alive during hard times

Solution : The right choice is the fourth option .

The idiom, keep body and soul together essentially means to sustain one's life or existence, especially in difficult or challenging situations. It implies managing the necessities for both physical (body) and spiritual (soul) well-being. This could involve meeting basic needs such as food, and shelter, and maintaining a sense of personal integrity or morale to endure hardships.

Therefore, the most appropriate meaning of the given idiomatic expression is, stay alive during hard times.