Answer :
Final answer:
Community interactions in ecosystems determine access to energy and matter through competition for limited resources.
Explanation:
Community interactions within ecosystems play a significant role in determining how organisms access energy and matter. Organisms compete for limited resources such as food, water, sunlight, and mineral nutrients, which provide energy for metabolic processes and physical structure development. These interactions are influenced by factors like season, habitat selection, disturbance, and environmental variables.
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