Identify a dependent variable in the experemental design

Analogy- 1 is to arete as 5 is to cirque horn glacial valley hanging valley

Look at the following answer choices and determine which belongs in the both category. testable, can be disproven explains natural phenomena, has evidence to support it prediction, tentative, one or more scientists working together well established, many different scientists working independently, highly reliable

Me the formula cacl2 represents the compound