Answer:
Blue light
Adding 10-20% blue light allowed plants to grow much healthier, with a compact appearance. There is also far-red light which is has wavelengths that are lower than normal red light–similar to near-infrared wavelengths. Far-red light helps the plants produce greater yields.
I'm pretty sure the answer is B
Cerebellum smoothes and coordinates the movement of skeletal muscle.
Air pollution
hope this helps :)
