D is the answer to the question
D. Estuaries
Estuaries are a place where fresh and salt water mix.
Answer:
Nature
Explanation:
Because erosion happens in the nature.
The difference between an artery and a vein is that arteries are larger, more muscular and more elastic than veins; they carry blood that is under pressure from having been pumped out of the heart; veins are under much less pressure, so they are not as strong
Individual, population, community, biome, ecosystem
