Question

which pieces of information are necessary to describe an objects motion?
position, direction, and speed
direction and speed
position and speed
position and direction

Explanation:

To describe an object's motion, we need to know its position (where it is), direction (where it is going), and speed (how fast it is moving). Speed alone (as in just direction and speed or just position and speed) doesn't fully describe motion as position is crucial. Also, just position and direction without speed doesn't tell us how fast the object is moving towards that direction from that position.

Answer:

position, direction, and speed