Question

topic: recycling is important
choose a reason that backs your stance on the topic.
reason 1? reason 2 reason 3
it keeps the water and air cleaner
you can go swimming
pets can protect you

Explanation:

Recycling helps in reducing pollution. Cleaner water and air are direct results of reduced pollution from waste that would otherwise be dumped or burned. The other options ("You can go swimming" - which is a very specific and not a direct environmental benefit related to the core of recycling's importance; "Pets can protect you" - completely unrelated to recycling) are not valid reasons for why recycling is important.

Answer:

It keeps the water and air cleaner