If vegatation were to decrease then primary consumers that are herbivores which are usually the prey will start to decrease too, because there food source is becoming limited. It's like a domino effect, if something is unbalanced in the ecosystem then the whole ecosystem could collapse.
Answer:
They consist mainly of iron-nickel metal with small amounts of sulphide and carbide minerals. During the decay of radioactive elements in the early history of the solar system, many asteroids melted and the iron they contained, being dense, sank to the centre to form a metallic core.
Explanation:
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The correct answer is so that laws reduce pollution by a suffice amount<span />