Need...survival will always trump what u wish for!
Desire by far. "Needs" can be a burden. ("I need to study") whereas a desire ("I would kill for an eclair") seems much more gratifying and is way stronger...
Either one but depends on the person
clearly a need
From experience , a need comes from the ego. It says "without this , i will die , or if i don't do this i'll die. It's usually alot of garbage. A desire comes from the true self. It wants to have these things. I think desires draw us to actually doing something , and thus is stronger.
desire..... trust me!