The birdwatchers, a noun is a person place or thing
plastic bags spread more then alot of other garbage and makes its way to sea creatures much easier, where they could be mistaken for jellyfish and eaten, which would be harmfull to the sea creature.
D. Pre-owned vehicle I think but I’m quite dumb so I’m not too sure
The second one would be they won’t because you basically have to make the word shorter and won’t is will not
Hope this helps—xoxo