[Solved] Another effect of global warming is that it contributes to further warming of the planet. What is this process called? A) cycle of warming B) ratio warming C) positive feedback loop D) redundant warming Two-Tail: A term used in statistics referring to the two-tailed test of significance that checks for the possibility of positive or negative differences. Observations: The act of noting and recording something with instruments or the naked eye as part of a scientific or empirical study. Untreated Population: A group in a study or an experiment that does not receive the treatment or intervention being tested. Significance Level: The threshold in hypothesis testing that determines the probability of rejecting the null hypothesis when it is actually true, often denoted by alpha.