In the following food chain, $\displaystyle 5$ J of energy is available to man. Calculate, how much energy was available at the producer level. Why ? Plant ⟶ Goat ⟶ Man

Plant → Goat → Man According to $\displaystyle 10$ % Law, only $\displaystyle 10$ % of energy from a trophic level is transferred to the next trophic level. So, if Man has $\displaystyle 5$ J energy then Goat has \(\displaystyle 5 \times 10=50 \mathrm{~J}\) And plants (producers) have \(\displaystyle 50 \times 10=500\) Joule