The inside. The seeds can be toasted and eaten like sunflower seeds. They are quite tasty.
The stem
If it is eaten in large amounts or eaten with a big meal, yes.
pumpkins
yes, I've bought and eaten it.
The bugs will invade and the pumpkin, and maybe the vine, will be eaten/rot away.
food
Pumpkins are eaten year around, usually as pumpkin pie (a popular thanksgiving dish) & pumpkin bread. I have seen recepies for pumpkin soup and other dishes.
what name of plants that all parts can be eaten
sometimes Halloween but the most likely answer is Thanksgiving
The upper parts.
I'm probably guessing that pumpkin seeds are eaten up by animals such as deer, moose, etc. Then later on, they deposit the seeds via feces, then they grow.
anywhere