The primary force would be Thermal Convection, it pushes it and thus makes continents drift.
-Hope that helps, Nexxmexx :3
So you didn't provide any statements but I'll describe gravity for you and hopefully, it'll help.
Science: Gravity is the force that holds down objects and causes them to fall. It pulls down on an object, causing said object to fall or to remain in contact with the ground. Gravity is also what keeps the planets of our solar system in orbit of our sun and it keeps the planet's moon in orbit around the earth.
Gravity can also mean solemn importance, or seriousness of demeanor.
Hope this helps. :)
Answer:
They are all types of motion energy.
Explanation:
The period of a simple pendulum is:
T = 2π √(L/g)
where L is the length of the pendulum and g is the acceleration due to gravity.
The period of a pendulum can be decreased by decreasing the length of the pendulum or by moving the pendulum to a place with a higher gravity.
The period of a pendulum can be increased by increasing the length of the pendulum or by moving the pendulum to a place with a lower gravity.
The most logical answer would be C :)