Question:
Use evidence from the fact that as the supply of food in an environment decreases , the population of animals in that environment will decrease to answer the following question. "What is an example that ecosystems are an interconnected world?"

Answer:
animals' numbers decreasing when food decreases

Question:
Use evidence from the fact that mechanical weathering is when rocks are broken down by mechanical means to answer the following question. "If a stone is broken down into sand it is"

Answer:
mechanically weathered

Question:
Use evidence from the fact that pollution is a source of pollutants to answer the following question. "Pollution is a source of what?"

Answer:
dirtying agents