According to the law of conservation of mass, the mass of the reactants in a reaction must the mass of the products in a reaction.
A.
be different from
B.
be equal to
C.
be greater than
D.
be less than

The independent variable would be the fertilizer as it is what the dependent variable (the growth of grass) depends on.

Chuck gimp l synology finnick full by noon l hub j

Gravity, from the center of mass of the box, extending downward normal force, from the floor under the box, extending upward, equal to gravity push force, acting at a point on the box, extending in the direction of motion friction, acting at any point on the box directly opposite the push, extending directly opposite to the motion