Can someone please help me answer this please?

i think that d. wind is the answer.   i missed the question when i answered a. currents.

50% lit on the left side

the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.