Respuesta :

Answer:

As a seed plant grows, the roots grow downward due to the force of​  Gravity

Explanation:

A seed is planted upside-down, but the roots still grow in the direction of gravity.

Answer:

Obviously, it's gravity

Explanation:

  • Because when saying moving downward, it means an object is moving down, and that is caused by gravity.
  • If there is no gravity then it is called 0 gravity, meaning free from the ground.