All of the energy (calories) consumed by humans originated in sunlight and were initially made available through the process of

Question

Quizplus · Accepted Answer

The energy consumed by humans ultimately originates from sunlight and is made available through the process of photosynthesis, in which plants convert sunlight into organic compounds that can be used by other organisms as a source of energy. Plant respiration and decomposition/nutrient cycling play important roles in the recycling of these organic compounds, but they do not contribute as directly to the initial production of energy as photosynthesis does. Therefore, B is the best choice.

All of the Energy (Calories) Consumed by Humans Originated in Sunlight