Yours is Need. You are correctly moved by genuine need, both your own and other people's, and by the plain practical necessity of the moment. When a real need is present, something that actually has to be met, your motivation is clean, focused, and completely trustworthy; you see what is required and you move toward it without fuss. This is a grounded, useful fuel. It keeps you responsive to what is genuinely called for rather than chasing things for show, and it makes you reliable when something truly needs doing.
What keeps this fuel clean is the difference between what is needed and what is merely wanted. Wants are loud and dress themselves up convincingly. A real need is quieter and, once you look straight at it, obvious. You are wired to tell the two apart, and when your mind leads you astray it is usually because a want has borrowed the language of necessity. Lived well, this makes you clear-headed in situations that scramble other people. You are not chasing status, novelty, or approval. You are looking for what actually has to happen, which is why you can walk into a mess and find the one thing that matters.
The one thing to watch, gently, is the shadow side. Need drifts off course in two ways. The first is manufactured or projected need, motivation that goes off when the need is not really there, invented, or borrowed from someone else's story. The second, and the important one, is that under pressure real Need can quietly collapse into fear. The two can feel almost identical from the inside, both urgent, both insistent, so the correction is simply to check honestly, in the moment: is a true need driving this, or is it fear wearing need's clothes. When it is genuine need, trust it fully and move. When it is fear, you have found the thing to see through, and naming it is usually enough to loosen its grip.