Answer:
<h3>1. producers releasing it as a product of photosynthesis </h3>
Explanation:
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Answer:
Option d ; energy
Explanation:
Energy is the main component of life. From simple processes such as photosynthesis, to the production of plants, to reproduction in mammalian life, all depend on the life-driving force of energy.
In the bear's life, the energy is needed for cellular processes like respiration, particularly the Krebs Cycle. Not only that, because bears live in polar regions, they need heat to keep them warm. Without energy, they will not be able to move, hunt or sustain themselves.
Rocks can be a physical evidence that shows the earth has changed naturally because most rocks survive for millions of years and you can use this to determine the processes that happened over time.