<span>Florida's legal definition of controlled substances includes opium and its derivatives (opioids), as well as cocaine and all of its derivatives. These substances are referred to as "controlled" because they require a prescription from a doctor in order to obtain legally.</span>
The correct answer is B. the hollow box within a violin.
This large, flat piece of wood found in a piano produces the sound when the piano is played, the same way the hollow box produces the sound coming from a violin. The two items have the same purpose, which is to provide the instrument with sound.
Bart) IV: time in microwave
DV: mice strength
Conclusion: the time in the microwave does not affect the mices strength
Improvement: Retest
Lisa) IV: Ragooti hair cream
DV: hair growth
Hypothesis: If rogooti is used in hair then it will increase growth speed because it contains special ingredients
From my personal opinion, there is no possible way to answer this question without giving free personal bias' . This question is completely opinionated. But, Yes I do believe you are correct.