“any process used to ask and answer testable questions about observations of the natural world” defines which term?

The correct answer is scientific inquiry.

Explanation:

A cooperative and coordinated effort to illustrate, search out, foretell and explain the natural appearances is termed as a scientific inquiry. Scientific inquiry advances via a spontaneous procedure of data collection, examination, assessment, and interpretation.  

The scientific inquiry is a systematized methodology to discerning nature. It looks to provide empirical proof of natural incidences so that scientists can spontaneously elevate their knowledge of the natural world.  

for  example, forests have higher evapotranspiration than other ecosystems,  such  as grasslands, because of their deeper roots and greater leaf area. thus forests have a net moistening effect on the atmosphere and become a moisture source for downwind ecosystems.