Answer: " S , P , O , N, C, H " .
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Explanation:
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" S (sulfur), P (phosphorous), O (oxygen), N (nitrogen), C (carbon), and H (hydrogen) — are the six elements from the Periodic Table of Elements — and from the answer choices provide — that are the most present in living things.
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b. thyroid gland
C. adrenal gland
d. pancreas
Skepticism is based off of invalid data or an experimental error, but in this case the scientist is being biased.
A control is a variable-independent element. Therefore, option (A) sunlight is the control used as a point of comparison.
Experiments and observations in the field of science that are designed to reduce the influence of factors other than the one being studied are examples of scientific controls. This makes the results more reliable, most commonly by allowing a comparison to be made between the control measurements and the other measurements.
Controls reduce the effects of other factors on the experiment. It verifies an experiment's claim. Controls are needed for all experimental testing, not just science.
Therefore, sunlight is used as control because its a natural source of light and most plant grows in it.
Learn more about Control variables, here:
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