I would say D but i’m not sure
Answer:
A. Falsifiability.
Explanation:
A statement, hypothesis, or theory is falsifiable if it can be demonstrated to be false by observation. More technically, it is falsifiable if it is contradicted by a basic statement, which, in an eventual successful or failed falsification, must respectively correspond to a true or hypothetical observation.
D. The poets unity with the natural world
Reason: I got it right in OW