Most likely it’s going to be B. —Something to be Solved.
The independant clause mean the simple subject which says that you can read a part of a sentence that makes a lot of sense. So in this sentence "Since you are writing a poem, how will you use metaphors?"
The dependent clause is the one that makes no sense while being alone.
In this sentence the dependent clause is Since you are writing a poem.
It makes no sense all alone in one sentence.
Now for the actual question answer is the independent clause.
The independent clause is how will you use metaphors?
I think that is the independent clause because it really makes sense even though it's a part of the question.
I’m pretty sure the answer is: B. Badger
Spring (hydrology)
A spring may be the result of karst topography where surface water has infiltrated the Earth's surface (recharge area), becoming part of the area groundwater. The groundwater then travels through a network of cracks and fissure—openings ranging from intergranular spaces to large caves. The water eventually emerges from below the surface, in the form of a karst springs.