What are multiple reporters practicing when they agree to vote on certain things and not others?

The correct answer is 'selective journalism'.

Explanation:

The given statement is an example of selective journalism where multiple reporters agree to vote on certain things and not others.

The journalists show a biased behaviour towards certain events, altering or manipulating the perception of how things actually are in reality.

In this kind of journalism, the standards and ethics of journalism are compromised by the journalists which is not at all a good practice.