Brad and erin decide to have a tug of war contest. erin pulls the rope with all her might and so does brad. sadly, brad only pulls with half the force that erin pulls with. since the forces are unbalanced the rope will move towards erin. what is one way to brad balance out the force on the rope so that it no longer moves? a) ask erin to let go of the rope. b) make the rope longer so brad can get a better grip. c) let sarah, who pulls just as hard as brad, team up with him to pull the rope together. d) let sarah, who pulls just as hard as brad, team up with erin to pull the rope together.

Option C, Let Sarah, who pulls just as hard as Brad, team up with him to pull the rope together.

Explanation:

The force on the two sides of the rope will be balanced when it will be equal and opposite of each other. Since both Brad and Erin are pulling the ropes in opposite directions, hence the directions are opposite. But the force exerted by Brad is just half of the force of Erin. Hence, if somebody life Sarah who also can pull the rope with only half of the force excreted by Erin can team up with Brad to make forces on both sides equal to each other.

Thus, option C is correct

because the light is a great source of energy for the plants to survive. (i hope this )