Answer:
i think its D
Explanation:
Because homeostasis is to maintain the internal enviroment of an organsism body constant .
organs responsible for homeostasis :
lungs: keep the concentration of carbondioxide and oxygen constant
skin: regulates the body temperature
kidney: regulates the concentration of water and urea
liver : regulates blood sugar level
A plant-life filled biome of sorts, like a thick forest.
Hope this helps!
When two experiments are identical except for one variable, the experiment is called a controlled experiment