Question

read the claim below.
public transportation should be free.
select the piece of evidence that best supports this claim.
free public transportation would encourage more people to ride buses and trains, which cause less pollution than cars do.
several cities around the world have experimented with free public transportation but eventually had to bring back fares.

Explanation:

The claim is that public transportation should be free. The first piece of evidence states that free public transportation would encourage more people to use buses and trains, which cause less pollution than cars. This provides a positive environmental reason to support making public transportation free. The second evidence talks about cities bringing back fares, which is a reason against free public transportation, so it doesn't support the claim.

Answer:

Free public transportation would encourage more people to ride buses and trains, which cause less pollution than cars do.