Consider these options:
- Ocean pollution has many harmful effects on the ecosystem.
- Corporations and people both deserve blame for pollution.
- Chemicals as well as trash are disrupting marine life.
They are all directly stated in the passage. Option "People throwing trash in the ocean is the biggest problem for sea creatures" is not supported by the passage because the author never states what causes the most harm or is the biggest problem; it simply states that there are multiple sources and types of pollution.