1. Mixture--Lettuce AND tomato
2. Mixture-- Air consists of many different elements and gasses
3. Pure-- You aren't changing the substance of wood by shaving it, but if you were thinking from a makeup level it would be a mixture to begin with
4.Mixture-- There is more than just water in pond water...bacteria and such.
5. Not sure--I might say pure but I don't know for sure
6. Mixture-- Sugar AND water
Even after they'e declaration of indepedence was issued. Segregation was big in the south.
I guess it would be easier for us to define the disadvanatges if you tell us about the technologies you want to mention. For example, it is hard to think of technology and nature together but even advances like Artificial Intelligence (AI) that could not be further removed from the natural world are helping conservation efforts. Well, at least I tried to answer your question. More help you can get if you check the tips at Prime Writings site. Good luck with it!
A personal narrative is a story from your perspective
5 lines and a syllable count of 5, 7, 5, 7, 7