lob
I'm guessing: lag
Ore is a three letter word and is a mineral that contains metal that is valuable enough to be mined.
The three later word that means view is see.
The three characteristics of a supply curve are the slope, shift, and the curve's position. Together they help determine supply and demand trends.
Two. One for its location on the curve (which, because it is a curve, requires only a single piece of information) and another one for its speed along the curve. Its phase space is thus two-dimensional.
Observe means to see.
A three letter word that could mean clever is sly.
Sly
ilk
Nix
apt