Which is an abiotic factor of an ecosystem?

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

Natural resources are any materials that humans obtain from the earth to meet our wants and needs.

What is the most important inorganic material for livings things? ! due tomorrow!