A biological elevator, its passengers water and sugar. Or a category for the maths and sciences.

I move without feet, I grow when shared, I die if locked away, Yet I’m never alive.

I am taken before I am given. I exist only when measured, yet measuring me changes me. I can be saved, wasted, killed, and stolen, but I cannot be touched or seen. What am I?

What am I? To find out, first follow a curved line. Then, find some honey there. That's it, you should have all the information you need now!

I speak in clues instead of telling you anything directly. I look harmless until you try to untangle me. I reveal my meaning only when you stop reading my words and start thinking around them. What am I?