The answer is D. white light
Producers: Create food/Product
Consumers: Eat the food/Use the product
Decomposers: They can decompose after death. They could be Producers or Consumers while they are living, but ya' know... they are dead now, so....
I hope I helped.
Answer: speed
Explanation: speed of light is dirrerent in different mediums. Also wavelength changes but frequency remains same
