<span>D. they take hundreds to thousands o years to complete a cycle</span>
Answer:
As they produce food by the process of photosynthesis which cannot be done by anyone else. Plants use chlorophyll, CO2 and H2O in photosynthesis( which is a biochemical process). Plants became a cause of life on earth. Hence plants are the ultimate source of food on earth.
Answer:
Mass
Explanation:
The larger a star's mass, the shorter it's lifespan.
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