The Airplane wing is a curved shape with varying thickness that is designed to produce Lift that is centered at approximately 1/4 of the distance from Nose to Trailing Edge. This is called the Center of Lift or the Quarter Chord.
The placement of the Wings with respect to the fuselage is such that the weight of the aircraft is supported at almost the same point as the center of Lift. This helps balance out the forces acting on the airplane. If the Weight is located AFT of the wings Center of Lift, then the airplane will try to pitch nose UP. The aircraft Tail surfaces and controls apply a force to pull up on the tail and balance the airplane.
The wing not only produces a Lift Force, it produces a Moment that tries to twist the wing's nose in the down direction. So even though the forces are balanced with Wing Lift and Weight and the Tail forces, this Moment must also be taken into calculation.
The wing has one or two Spars that run the length of the wing from one tip to the other and these carry all the forces. Wing Spars of the large passenger jet airliners are made of heavy plates and I-beams of Aluminum Alloys and Steel that are riveted together. Even in a crash, these spars usually do not break at the point where it joins the fuselage because of the way it is constructed.