Give scientific reasons :
(a) The pyramid of energy is always upright .
(b) In an ecosystem the energy flow is always unidirectional .
(c) Ozone present in the startosphere is called as " good ozone " .

Explanation

(a) The pyramid of energy is always upright . Pyramid of energy is always upright , because energy flows from a paricular trophic level to next. Some energy is lost in the process thus it can never be inverted .
(b) In an ecosystem the energy flow is always unidirectional .
An energy captured by autotrophs does not go back to solar energy , i.e., which passes to herbivores does not go back to autotrophs .
(c) Ozone present in the stratosphere is called as "good ozone ".
As ozone absorbs UV rays from sun , which is harmful to living organism .