Answer:
C) It involves interactions between biotic and
abiotic factors.
Explanation:
Ecosystems need energy imput, need both consumers and producers, and can exist on land, lakes, rivers and oceans.
Must be a comet I believe
one species using another as a food source, typically killing it
Answer:
Because of using fossil fuels nowadays it is used to air pollute the earth causing global warming.
Explanation:
