Answer: Electric - Light Bulb
Explanation: The most important invention changed the life of Americans is <em> Light Bulb of Thomas Edison. </em>
<em></em>
<em>Mark me Brainliest, please.</em>
Depends on your world view
Answer:
In the lab activity, I used a virtual watershed to demonstrate how pollutants enter and flow through the watershed. I constructed food chains to show how biotic factors are related. I also predicted and modeled how human activity affected the biotic factors in an ecosystem. Based on my observations, I can conclude that biotic and abiotic factors are closely linked and that human activity that changes the environment, like pollution, can affect all the other parts of an ecosystem in a negative way.
Explanation:
