Answer:
Coastal erosion is a result of human activities and natural environment changes making the coastal dynamic action (wave, current, wind) lose balance in the coastal process, and the long-term loss of sediments of coastal zone results in the destruction process of coastline retreat and beach erosion.
Explanation:
You can find it in the front of a dictionary
I believe it would refer to intelligence quotient.
Answer: 2: my brother can't sing well.
3: My dog can catch the ball.
4: My grandmother can't use a computer
5: My sister can ride a horse.
6: My grandpa can't speak English.
Explanation: Hope this helps :P
