In the 1930s, new farming methods .a. increased the ownership of farms. b. prevented topsoil from blowing away. c. prevent droughts. d. made drought conditions worse

The answer is letter C. It helped prevented droughts 

The government was able to come up a certain way in order to prevent another Dust Bowl to occur in the US. They were able to introduce crop rotation and irrigation and soil tillage. These new farming Methods were introduce under the New Deal. The New Deal program was one of the program being implemented by the US government during the Great Depression

Answer were lower;

When a lake, river or other aquatic  system  becomes  eutrophic, it can have serious negative effects on other organisms like fish, birds and even people.if an algal bloom is so bad that it causes wide-spread death  in  the  water, the organisms that die will all sink to the bottom and start to decompose.