This amazing website shows some animations that will explain these things better than I can:

http://www.geistware.com/rcmodeling/...mics/index.htm

The horizontal thrust force keeps the wing going thru the air.
The downthust adds to the weight that the wing has to sustain in the air while it subtracts from the horizontal force.

The airfoil shape of the wing transforms that movement into a force pointing up or lift.

Everything else (including the engine that generates the thrust) hangs from the wing or falls to the ground.

Have you ever seen a wing detaching from a model airplane in flight?
It cannot keep flying, it flips and rotates in the way down. Why?
Because a wing alone is non-stable.

The wing needs something far away from it that keeps it in a more or less horizontal position, so it can do its staff: transforming thrust into lift.
That something far way that keeps the wing in the position it needs to be is the stabilizer, which can be aft (tail), forward (canard) or built-in as reflex for a flying wing.

We change the lift (up or down) of that stabilizer at will (elevator up or down inputs).
Then, we induce a rotation in pitch around the CG.
The nose of the fuse points up or down and the AOA increase or decreases.

When the AOA increases, under our command, the wing transforms that thrust into more lift, at the expense of reducing the velocity of flight, and the plane goes up in a loop.
The opposite happens when we feed down elevator, the plane loops down and accelerates.
We can hear that engine changing rpm’s in both cases, because the wing is asking for more (when going up) or less (when going down) thrust and torque.