Humans have caused quokka populations to decrease due to animal cruelty. Humans have also introduced predators to quokkas, such as dogs and cats.
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Answer:
2.
Explanation:
only 2 of them are the causes of air pollution
Answer:
Primary consumers exist in all biomes and fill a wide variety of niches. They can range from microscopic organisms such as zooplankton to animals as big as elephants.
Explanation:
Answer:
Autotrophs also known as plants or even producers.
