Multiple choice

Formation of the potholes in the river is an example of

  1. corrosion

  2. corrasion

  3. collision

  4. congrave

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Corrasion is the erosion process where rock debris carried by water grinds and wears away the riverbed, forming circular potholes. Corrosion is chemical dissolution, collision is impact without erosion, and 'congrave' appears to be a misspelling or non-existent term in this context.