Green plants are the first living organism in a food chain. where do plants get the energy that they pass along to the primary consumers in their food chains?

From sun.

Explanation:

10% law. When organisms are consumed, approximately 10% of the energy in the food is fixed into their flesh and is available for the next trophic level (carnivores or omnivores). When a carnivore or an omnivore, in turn, consumes that animal, only about 10% of the energy is fixed in its flesh for the higher level. 4 different food chains ; plant parts in 4 different food chains, there should be 4 green lines between mice and plant parts.

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explanation:

as many times as you want