Question

energy flow begins with which of the following? oxygen cycle decomposers photosynthesis plants

Explanation:

In an ecosystem, energy flow starts with photosynthesis. Plants use sunlight, carbon - dioxide and water to produce glucose and oxygen through photosynthesis, capturing solar energy. This energy is then passed on to other organisms in the food chain. Oxygen cycle is related to the movement of oxygen in the environment and is not the start of energy flow. Decomposers break down dead organisms and recycle nutrients but do not initiate energy flow. Plants are the result of photosynthesis and the medium through which the energy captured in photosynthesis is used in the ecosystem.

Answer:

C. Photosynthesis