Answer:
Animals are repeatedly eating the plastic, getting stuck in the plastic, and the plastic polluting their homes. There is also a place in the Pacific called "The Great Pacific Garbage Patch" and it is roughly 1.6 Million square Km.
The first one with the boxing crab and anemone is mutualism.
The second one with the dog and flea is parasitism.
Breaks down over time and becomes dirt
Synergistic Interaction
Hope helps uh :)
I'm gonna go and say it's parenchyma but I'm not 100% sure
