In 1868, president andrew johnson was impeached after he removed secretary of war edwin stanton from office without first getting approval from the senate. president johnson was impeached because he had violated which law? awnser is the tenure of office act

The Tenure of Office Act

Explanation:

That was the answer on study island :/

powers  are  denied  to the  national governmentin three distinct ways: some  powers, such as the  power  to levy duties on exports or prohibit the freedom of religion, speech, press, or assembly, are expressly  denied  to the  national government  in the  constitution.

food chain i would say only because there is competition on getting food and survival