Final answer:
D. A letter to your landlord explaining why you are breaking a lease is a writing situation that requires explaining causes or effects.
Step-by-step explanation:
Out of the given writing situations, the one that would require explaining causes or effects is d) a letter to your landlord explaining why you are breaking a lease.
In this situation, you would need to explain the reasons (or causes) that led to your decision to break the lease and also the potential effects or consequences of your decision. This might include factors such as financial difficulties, job relocation, or dissatisfaction with the property.
To effectively convey your reasons and the potential effects, you could use a paragraph structure that presents the causes first and then explains the effects. This will help your landlord understand your situation and make an informed decision.