The arctic environment is deathly cold, hence the thick blubber on animals so they can handle freezing temperatures
Answer: The organic molecules required for building cellular material and tissues must come from food. Carbohydrates or sugars are the primary source of organic carbons in the animal body. During digestion, digestible carbohydrates are ultimately broken down into glucose and used to provide energy through metabolic pathways.
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I believe it is A. Primary succession starts with plants and rocks.
