What are public policies? Give examples.

When courts and legislatures make the decision to legalize same-sex marriage or to make same-sex marriage legal or illegal, they may take into account what they believe is good for the public as a whole. They may also consider cultural ideas on the issue. Their decision can shape public policy.

Explanation:

thats an example

thurgood marshall

explanation: in 1954, thurgood marshall and a team of naacp attorneys won brown v. board of education of topeka, kansas. in this landmark decision, the supreme court held that segregation in public education violated the equal protection clause of the fourteenth amendment.

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