Answer:
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Observations are recording something that is already there
(qualitative and qauntitative)
an inference is an assumption or conclusion that is logically made
I’m on that same question
The answer is "because water is produced as a by-product"...the word dehydration should also be a major clue because that means water loss.
Echinoderms are more closely related to human than to a jellyfish because they are biltarian.
I hope this helps!