Based on the food chain below, if a bald eagle acquires 50 kg of energy, how much energy did the herbivorous duck get from the aquatic vegetation?
aquatic vegetation --> herbivorous duck --> bivalves --> sea ducks --> bald eagle
i know its 50,000 kg but how is the division worked down?

50,000 x 0.10 = 5,000J

10 percent rule

Food chain refers to a process cycle from producer to consumer to decomposer.
Plants – herbivores – omnivores – carnivores Start -> Plants -> herbivore insect -> spiders -> small bird -> Snake -> hawk -> fox -> lion -> when died the body will be eaten by hyena-> when hyena died -> body get decompose and be eaten  by worms and the rest will be plant’s fertilizer.

The process of the food chain will then again takes place over and over again. 

What are you tryna ask us