It was said to have originated from North America. The oldest evidence was pumpkin seeds from between 7000 - 5500 BC from Mexico. <span />
The riddle which says the one who built have not used it before, and the user has never for once seen it, is Coffin.
- This statement can be regarded as a riddle, which is a question, phrase that can be termed to different meaning it is puzzle that needed to be solved.
- Coffin here are used for human remains , and the maker of has not used it before because he still alive.
Therefore, a Riddle is a way to test our ability to reason in different ways.
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The answer is <u>"c. a confounding variable is an explanatory variable that was considered in a study whose effect cannot be distinguished from a second explanatory variable in the study."</u>
A confounding variable is an outside impact that progressions the impact of a dependent and independent variable. This superfluous impact is utilized to impact the result of an exploratory plan. Just, a confounding variable is an additional variable went into the condition that was not represented. Confounding variables can destroy an analysis and deliver pointless outcomes. They propose that there are connections when there truly are most certainly not. In an examination, the independent variable by and large affects the dependent variable.
They show the most important substances as it can show how they reac in a chemical and how they are able to react
Answer:
https://www.history.com/topics/native-american-history/native-american-cultures
Explanation:
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