Question

how do petitions contribute to democracy? they can circumvent the need for voting. they can alter the constitution. they show a popular desire for change.

Explanation:

Petitions are a tool for citizens to voice collective preferences. They do not bypass voting, nor do they directly alter constitutions (which require formal, specialized processes). Their core democratic role is signaling widespread public support for a change or issue.

Answer:

They show a popular desire for change.