No, parsley is an herbaceous plant.
Because of it's hollow stem.
Yes.
Yes, if you just cut it, rather than pull it up. It is in the parsley family and grows like grass. Of course, you need to be growing it in the proper climate zone for it to survive. If you are, then you should have no problems cutting it and it growing back.
Stem of mustard plant is green and tender so it is a herb
You cut a tulip at the very end of the stem at a 45 degree angle. You can cut the stem as short as you want to put in a certain size vase after you have cut it properly from the ground.
They are cut into two pieces
No!!!!! IT STOPS IT FROM GROWING IF YOU CUT IT ! sorry to yell but you may kill the plant (lol)
Marjoram can work A bit of rosemary cut with parsley
Depends on how you want to serve it. If you just want to leave it straight, cut the end of the bunch. If you want to cut it into pieces, separate the bunch it to groups to cut, for example: leaves, middle stem, end stem
45 degrees
Let the foliage go brown entirely before cutting it down.