I'd say heat, more specifically sunlight.
Why?
Because sun is the form of energy needed for plants to grow and live. Plants in turn are the form of energy needed for herbivores to live that later on turn out to be the form of energy needed by the carnivores. When these die, decomposers will be the ones to take advantage of the energy.
As you can see an ecosystem has already been formed: producers, secondary consumers, tertiary consumers or decomposers.
Hope it helped,
Happy homework/ study/ exam!
<span>representative respiratory reflexes? Not so sure so confirm online
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Answer: C. Resources can be unavailable in areas where they are needed
Explain: resources on earth surface for an evenly distributed most resources are unavailable where they are actually needed. Foreign exchange and internal trade brings the resources into distribution between the nation.
Hope this help :D
Answer:
Diamonds cam form in the mantle because of the impact of the weight of the overlying rock which bears down on it, in combination with the high temperature of the area where they are formed (about 100 miles beneath the surface). Therefore, the correct answer is option D. The weight of the rocks above the mantle results in high pressure.
Explanation:
because of the impact of the weight of the overlying rock which bears down on it, in combination with the high temperature of the area where they are formed (about 100 miles beneath the surface)
