physic question

[limber berry]

The David wheel rotates easily around the O point.
a wheelbarrow from the same point in a fixed vertical direction
Figure I and
It keeps it in balance as in Figure II. in Figure II
center of gravity of watermelon and point O are same vertical
is on the direction.
In the case of equilibrium in Figure II, the equilibrium in Figure I
according to the situation;
To stabilize David I's wheelbarrow
force exerted,
II. The force that David applied to the wheelbarrow
Torque with respect to point O,
III. net torque acting on the wheelbarrow
Which of them decreased?

not efe david