The first step in the energy flow through an ecosystem is producers absorb solar energy (option C).
The energy flow takes place via the food chain and food web. Food chain is the feeding relationships between species in a biotic community.
During the process of energy flow in the ecosystem, plants being the producers absorb sunlight with the help of the chloroplasts and a part of it is transformed into chemical energy in the process of photosynthesis.
The above mentioned is the first process of energy flow in an ecosystem, after which consumers at different trophic levels feed on one another, starting with producers.
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