How does the right to free speech to create a more peaceful and stable society?

One of the worries, in a society without free speech, is that those in power will jail those who speak out against them. When power shifts, those that were jailed return the favor.

So, free speech enables all parties to know that they will have people say things about them but that they also are allowed to say things about their opponents in return.

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.