Answer:
Heterogeneous mixtures are substances not mixed together.
Explanation:
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The answer is (A)
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State the problem
Research
State the hypothesis
Test the hypothesis
Analyze the results
Conclusion
Answer:
cockroaches and other insects
People are connected to other living things such as trees and plants. Humans breathe in the oxygen the plants produce. People are connected to non living things such as stool from animals. Worms decompose the animals stool which makes the dirt richer. Humans use that rich dirt to grow plants that we consume for fuel.