<span>I think the answer is Three membranes. </span>
My Answer: <span>demographic transition
Hope I helped! :D</span>
The coorect answer is 175m
Answer:
observation or experience
Explanation:
Empirical method is a study that uses indirect or direct observations in order to gain some knowledge. It uses empirical evidences-information that are collected through observation or experience.
Theory that is tested by empirical method involves the use of objective, that is observed, highly controlled and replicable.