The understanding of the poem, as the way a poem is structured can change the meaning or how the reader understands it drastically.
Brainstorming. Researching. Many different techniques :)
B. a star at the center of our solar system
Present
Present progressive has "-ing", present emphatic requires the verb "do" or "does" and present perfect requires "is/has/have"
It would be: 2 + 1 = 3
In short, Your Answer would be 3
Hope this helps!