It is a true fact that raw sewage can cause eutrophication in a body of water. The correct option among all the options that are given in the question is the first option or option "a". The addition of excess amount of organic matter like manures, sewage can cause eutrophication. I hope the answer helped you.
Answer:
Hardness is the mineral's ability to resist abrasion or scratching.
HOPE THIS HELPS YOU!
The Great Lakes and Corn Belt region has about largest and diversed population of all the metropolitan areas in the U.S.
Explanation:
Of all the metropolitan area in the United States, The Great Lakes accompanied by Corn Belt region, is considered to be the most populous region with diversity and well educated people.
The area is also known for its agricultural productivity and is so remarked as the heart land of the North America, because of its presence in the center of the geographical location of the North America. It has the continental weather with mostly humid climate.
Answer:
the last option
Explanation:
gathering data and analyzing the results