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.
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.
It made shipments and trade much easier.
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Answer:
Participant observation
Explanation:
Participant observation is the way in which a person share a great deal of time with a group of people with aim of getting a better understanding of their community or society or with the aim is to gain a close familiarity with a given group of individuals in the society by observing them which is why the Cultural anthropologists often spend a great deal of time in the communities where they conduct research and they ask lots of questions as people work, celebrate, dance, or play in other to observe the participants.
D. all of these. they all make up the foster system