The part of the sentence that tells "who" or "what" the sentence is about is the subject.
The adverb is probably B. Leave
The correct answer is A. develop the theme "death conquers all."
Hamlet's famous soliloquy while he is holding Yorick's skull serves the idea that death will come for us all, regardless of who we are. Regardless of whether we are famous and strong, or irrelevant and weak, we are all going to die. He mentions people such as Caesar and Alexander the Great, saying that even they couldn't escape death.
Often times, the actual object is much more expensive to create. That's why many designers and engineers create a model to represent their ideas to a group. The model is much cheaper and faster to create, especially if it needs tweaking multiple times. Also, that model can have working parts - you could take it apart to show the inside/cross-section or have interactive sections that allow easier presentation of your idea. Those are things you can't accomplish with an actual object.
