The answer is: A. collecting data
During this process , researchers would use their observational skills and record every notable occurrence that happen to the variables.
The focus on this process is simply to add all relevant data without making any analyzation. That process come later on after the researchers started to change the variables in order to see whether it would create a correlation.
C. bicycle is your best answer
a bicycle has 2 wheels, and they are connected together through a frame and and has axles
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Human evolution and natural selection reduce susceptibility of disease. A simple explanation would be saying that the life forms that are not immune to the disease pass away, then the ones that are immune or survive genetically give this trait to their offsprings, leaving only life forms that are immune. This does not occur so easily and is a long process, but it is a simple explanation.
Your skin helps regulate our body temperature by causing shivering and sweating. Shivering helps keep your body warm in a cold environment. Sweating helps cool off your body when hot.
Answer:
The correct answer would be B, manipulated by changes to the independent variable.
Explanation:
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