Answer:
a problem that needs to be solved and its solution.
Step-by-step explanation:
The answer „a problem that needs to be solved“ is not right, as this text would only post a problem that needs solving.
The answer „details about a problem that needs to be solved“ is not correct, since it also only speaks of the problem and not the solution.
The answer „the solution to a problem that needs to be solved“ is not correct, this text would only have a solution without expressing what the problem was.
Answer „a problem that needs to be solved and its solution“ is correct. The full problem-solution text should describe the problem or issue, identify it clearly, and describe it. After the full explanation of the problem, the text should have a solution or the proposition of the resolution to the previously expressed dilemma.