LIFE SCIENCE

Detailed explanation-1: -Final answer: An ecosystem is characterized by energy flow, autotrophs converting solar energy to organic compounds, and decomposers recycling organic matter to inorganic compounds .

Detailed explanation-2: -Energy flow is the flow of energy through living things within an ecosystem. All living organisms can be organized into producers and consumers, and those producers and consumers can further be organized into a food chain. Each of the levels within the food chain is a trophic level.

Detailed explanation-3: -The fundamental source of energy in almost all ecosystems is radiant energy from the Sun. The energy of sunlight is used by the ecosystem’s autotrophic, or self-sustaining, organisms (that is, those that can make their own food).

Detailed explanation-4: -In most ecosystems, the ultimate source of all energy is the sun.

Detailed explanation-5: -Energy is passed on from every trophic level to the next and each time about 90% of the energy is lost with some being lost as heat into the environment and some being incompletely digested food.