A non-restrictive modifier add information that does not restrict who the subject can refer to (compare to "The one Marlena that enjoys many subjects" -this one restricts the subject to a specific Marlena). Here it's "who enjoys many different subjects" - it adds additional information about her, but doesn't change the referent.
Trees are helpful perennial plants. They help combat climate change, clean the air, provide oxygen, cool the environment, and help prevent water pollution and soil erosion and a number of other benefits. Without trees, surviving life here on earth would be impossible. Trees absorb carbon dioxide and release oxygen back into the air. They can also absorb odors and harmful gases and pollutants in the air by trapping them on their leaves and bark. They provide oxygen and have the capacity to cool the environment by bringing shades and releasing water vapor through their leaves. They help prevent water pollution, too, since they prevent rainfall from carrying pollutants to the ocean and other bodies of water. In preventing soil erosion, they have the capability to hold soil in place.
What I think is means your a foreigner no matter what you might go out of your country and bam your a different to them and your different form them you can always be a foreigner there is always going to be something or someone that’s going to different nothing ever is the same.
Hope this helped :)