It would be b because an acorn cannot eat anything so if it were in the middle or the end it would have to physically eat one of the 3 choices
D. most likely due to stress caused from unpredictable events.
All plant cells because all plants and or trees use photosynthesis for the same thing.
Some species move with a flapping motion of their lobes or undulations of the body.
I don't know, maybe because of the way we see animals. Not as our equal parts