Respuesta :

Answer:

  • 9 The water levels are constant in estuaries

Explanation:

  • 10.  Black sands are found when tides are particularly higher.
  • 11. Both tides and currents are predictable movements of water.
  • 12. The salinity of brackish water can vary with the tides.
  • 13. The barnacles attach themselves to seaweed and feed on it.
  • 14. Ocean helps to lessen global warming by absorbing lots of carbon dioxide.
  • 15. Five Solomon islands have disappeared because of erosion and increasing seas.
  • 16. Bottom-feeding fish are not part of the benthic community.