Answer:
1. Speed
Step-by-step explanation:
"how far an object moves in a certain amount of time"
"how far an object moves"- distance
"In a " - over
"certain amount of time" - time
Distance over time is speed.
The speed of an object is the distance the object travels in one unit of time.
Hope I Helped, Feel free to ask any questions to clarify :)
Have great day!
-Aadi x