Question: Why are some rocks smoother and rounder than others?

What is the correct answer to the question from the following choices?
OPTIONS:
- They have the shapes of the minerals from which they are made.
- They were smoothed by the action of wind and water.
- They were squeezed up through the soil.
- They hardened in rounded pockets of soil.
They were smoothed by the action of wind and water.
Fråga: Varför är vissa stenar slätare och rundare än andra? Vilket är det rätta svaret på frågan från följande val? ALTERNATIV: - De har formen av de mineraler som de är gjorda av. - De jämnades ut av vind och vatten. - De klämdes upp genom jorden. - De härdade i rundade jordfickor.
Why are some stones smoother and rounder than others? What is the correct answer to the question from the following elections? ALTERNATIVE: - They take the form of the minerals from which they are made. - They were leveled out by wind and water. - They were squeezed up through the earth. - They hardened in rounded soil pockets.
De jämnades ut av vindens och vattnets inverkan.
They were smoothed out by the effects of wind and water.