Which of the following represents energy flow in a grazing food web?

Which of the following represents energy flow in a
  grazing food web?
  a. producers >>> detritivores >>> decomposers
  b. producers >>> decomposers >>> detritivores
  c. producers >>> herbivores >>> decomposers >>>
  carnivores
  d. producers >>> herbivores >>> carnivores >>>
  decomposers
  e. producers >>> herbivores >>> detritivores >>>
  carnivores

Question 2

Food chains in the ocean depths tend to be long
  because these habitats have
  a. an abundance of producers.
  b. stable environmental conditions.
  c. a variety of energy sources.
  d. an abundance of decomposers.
  e. small numbers of predators.