Define the following terms:
$(i)$ Saprotrophs
$(ii)$ Trophic level

(N/A) $(i)$ Saprotrophs: These are organisms that obtain their nutrition by decomposing dead remains or decaying organic matter.
$(ii)$ Trophic level: Based on the source of their nutrition or food,organisms occupy a specific position in a food chain,which is known as their trophic level.