Which is an example of sliding friction

the answer is D. a bowling ball rolling down a lane

Explanation:

the answer choices for this question are:

A. a cars wheels rolling down the road

B. a bird flying through the air

C. a child applying the breaks on his bike

D. a bowling ball rolling down a lane

hope this helps :)

idk what the question is about

your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.