Question

Which line from the text best supports the idea of a positive effect from plastics in the ocean? “surprisingly, there are some creatures benefiting from all this plastic.” “the hard surface of the plastic pieces can help transport invasive species.” “as plastic breaks down, it releases chemicals that can affect water quality, animals, and people.” “there is concern about how this plastic is affecting birds and fish and the ocean ecosystem.”?

Answer 1

That line would be the first option - “surprisingly, there are some creatures benefiting from all this plastic.” 
It is the only line which has a positive connotation because there are still some organisms which don't find plastics in the ocean to be a bad thing. The other options show only negative consequences of plastics being thrown in the oceans.