EVERYDAY SCIENCE

Detailed explanation-1: -The vast majority of energy that exists in food webs originates from the sun and is converted (transformed) into chemical energy by the process of photosynthesis in plants. A small proportion of this chemical energy is transformed directly into heat when compounds are broken down during respiration in plants.

Detailed explanation-2: -In most ecosystems, the ultimate source of all energy is the sun.

Detailed explanation-3: -Energy enters most ecosystems as sunlight, but the rest enters the ecosystem through producers!