That would be the chloroplast.
Answer:
Explanation:increasing the stimulation up to the maximal stimulus
DNA is the correct answer but next time put answer choices so that people can better answer your questions. Thanks!
The answer is A. Fertilizer
The other answer choices don't make sense Herbicide is a poison that kills plants, Pesticide is an insect killer, while a Growth Hormone is designed to help the plant grow not to put nutrients into the soil.
I would assume that it would be A