Answer:
Arid countries do not use ocean water because that water has very high levels of sodium and these countries do not have the necessary technology to treat this water.
Step-by-step explanation:
There are some arid countries that suffer from a lack of water for the consumption of their inhabitants and for use in irrigating agricultural crops. Even with this water shortage problem, these countries do not use ocean water, even if they are located on the ocean side. This is because ocean water has high levels of sodium and the excess of this element causes animal and plant cells to lose water through osmosis, which shows that this water would cause problems in both human consumption and agriculture. However, it is possible to treat this water with a desalination process, but in order to desalinate the water it is necessary to have technology and investment for this and these countries have many economic problems and cannot pay for these resources.