Question: Which relationship is true?
Choices:
text: a soccer pitch slows the ball down via magic
label: A
text: a soccer pitch slows the ball down because it is wet
label: B
text: a soccer pitch slows the ball down because there is always wind
label: C
text: a soccer pitch slows the ball down via friction
label: D
Answer: D
Fact: friction acts to counter the motion of two objects when their surfaces are touching