Treating a person's mental disorders will reduce suicide risk.
All of the other options can be dangerous for those suffering from depression or who are suicidal.
Yoga can help relax your mind and help with your inner zen. It also helps with your focus. Meditation has the same effects
Dopamine is a reaction in the brain that causes desire.
'Carotid artery' is the one you're looking for. Mentioned quite a bit in English literature I might add.
