C the presence of harmful substances in food
I no it will be right because I took the quiz I no it is right it is A
Answer:
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Explanation:
Hello!
The correct answer is: True.
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Answer:
Independent Variable:
temperature
dependent variable:
chirps
Hypothesis:
the lower the temperatures the less chirps
constants:
temperature or food and water
repeated trails:
success and failure
control:the experiment
