A hypothesis that is non-falsifiable is what

Non-falsifiable hypotheses: Hypotheses that are inherently impossible to falsify, either because of technical limitations or because of subjectivity. E.g. "Chocolate is always better than vanilla." [subjective].

A statement, hypothesis, or theory has falsifiability if it can be proven false by contradicting it with a basic statement or observation.

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Explanation:

A hypothesis is hard to be considered "falsified" because it is based on the knowledge that you have and you are making a presumption based on a set of data and then working to prove and backup the hypothesis which could potentially be wrong but isn't falisfied as it is your own conclusion an not a statement    

the answer is z.

the human body has five levels of organization. level 1: cells. cells are the basic units of life and form the first level of organization. cells in the human body have specific functions. examples include nerve cells, blood cells, liver cells, and so on.