Answer:
the basic unit of a chemical element.
Explanation:
to see if its copatible with our environment or to see if there is any unkown element, otherwise i dont know
if wrong very sorry
It would be B because you want to know which TEMPERATURE is the best for the plant. Different brightness for a bulb will give different amounts of heat. Since the amount of heat is your INDEPENDENT VARIABLE, you have to change the amount of heat for each plant, so the brightness of bulbs. Therefore, B is your answer!
