What type of hydrologic forecast model gets the most accurate results

Plz put the answer choices thx.

Aeolian processes,  pertain to  wind  activity in the study of  geology  and  weather  and specifically to the wind's ability to shape the surface of the  earth  (or other  planets). winds may  erode, transport, and deposit materials and are effective agents in regions with sparse  vegetation, a lack of soil moisture and a large supply of unconsolidated  sediments. although water is a much more powerful eroding force than wind, aeolian processes are important in arid environments such as  deserts

Either b or c . i did this before

The fact that the earth goes through natural cycles for example the ice age some scientists belive that it is just another cycle