Answer:
Because each subject in an experiment has to have equal conditions to ensure the most accurate results. And water temperature is known to impact plant growth. An experiment using different water temperatures is a terribly inaccurate experiment.
Answer: 2500 i think don't count me on it though sorry if it is wrong.
Explanation:
I’m pretty sure the answer is C
You should typically give ventilation’s to a young child every 30 seconds.
Hope I could help! :)