Explain how volunteers were able to impact the outcome of the 2008 presidential election

President Obama won the election because of the efforts of enthusiastic and passionate people who volunteered their time to help him.

Explanation:just did it

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.

answer; negative punishment;