The polluted bacteria and algae interacts with fish and other aquatic wildlife, so they will be negatively impacted by that relationship in this case.
They have body fat level in the MARGINAL OR BORDERLINE ZONE. At this zone, the fat level in the body is higher than the acceptable levels but is less that the fat levels in the obese people. With this level of fat, one has higher risks for such diseases such as high blood pressure, heart diseases, etc.
They have chloroplasts. They do not possess mobility because they cannot just stand up and walk to the nearest river. Unicellular organisms are very small, and most organisms are multi-cellular, including plants. Plants, animals, and fungi are eukaryotic, but only bacteria is prokaryotic. So therefore, choice 3 is correct.
"(1) Human population growth reached 6.8 billion in 2010 and it continues to increase" is what led to the other <span>three, since all of these happen from human activity. </span>
