D. seems the most probable since plastic is barely biodegradable.
An estuary is an area where a freshwater river or stream meets the ocean. In estuaries, The salty ocean mixes with a fresh water river, resulting in brackish water. Brackish water is someone salty, but not as salty as the ocean. An estuary may also be called a bay, lagoon, sound, or slough.
option 2 seems appropriate for me!
Because water is a polar molecule, it makes an excellent solvent for polar and ionic compounds found within cells and tissues.