What executive level agency was organized as a result of 9/11

United states Department of Homeland Security

United States Department of Homeland Security

Explanation:

DHS is the youngest U.S. cabinet department. It was created in response to the September 11 terrorist attacks and established on November 25, 2002 by the Homeland Security Act.

The main purpose of this department is to implement a national strategy to prevent further terrorist attacks or threats. It works in the civilian sphere to protect the United States within and outside its borders.

The DHS employs 229,000 workers.

d is the correct answer.

b is incorrect because it makes food by itself

c is incorrect because us humans don't know how to produce their own food using the sun like plants.

a is incorrect because consumers can depend on carnivores for eating food for consumers to eat the dead organism. same thing with omnivores.

this null effect is caused by a weak manipulation and ineffective internal validity. in a scientific study, as the one dr. morimoto is trying to perfom, internal validity refers to the confidence placed in the cause-effect relationship and to how well an experiment is done and able to eliminate confounding variables.