a) Name the phenomenon in which non-biodegradable chemicals get accumulated progressively at each trophic level of a food chain. 

b) Which of the following belong to the first trophic level of a food chain? Grass, Grasshopper, Plants, Rat, Tiger [Foreign] Grasshopper, Plants, Rat, Tiger

c) Consider the following food chain which occurs in a forest: Grass -> Deer -> Lion If 10000 J of solar energy is available to the grass, how much energy would be available to If 10000 J of solar energy is available to the grass, how much energy would be available to the deer to transfer it to the lion? [Foreign] the deer to transfer it to the lion?

d) List two man-made ecosystems.

e) Write the name and formula of a molecule made up of three atoms of oxygen.