The lower portion of the body is held in place by the force of friction exerted by the car seat and the floor.
(The lower portion of the body; is held; L:in place; by the force of friction) (the force of friction; exerted; by the car seat and the floor)
The lower portion of the body the force of friction
is held exerted
L:in place by the force of friction
by the car seat and the floor