Explain the role of plants as essential resource.

Explanation

Green plants are capable of utilizing 1% of the solar energy through the process of photosynthesis to form chemical or food energy. The herbivorous animals consume the plants and 10% of the energy that stored in the plants is transferred to the herbivores (according to 10% law).
If the plants have 10 Joule of energy, then the herbivores will get only 1 Joule of energy and remaining 9 Joules would be lost to the environment a heat and by their decomposition.