Embankment refers to a long artificial bank built to retain water, or to support a road.
Answer:
Effective, because it includes facts from a credible source.
Explanation:
The author offers statistics from a well-known credible organization to support their claim.
1- darkening
2-much
3 - gentle or friendly advice
4- proficient
5- concurrently
6 - after an outline
your answer would be B. themselves
