1. dissolution and precipitation of are the main processes that form limestone caves. a. calcite
b. salt water
c. clay
d. sandstone

the answer is c.) there is a warm front in region a and a stationary front in region b.

thinking it would be d not too sure but i think it's right

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.