Answer:
The reduction of friction between the parietal and visceral surfaces of an internal cavity is the function of serous fluid.
Explanation:
Between the parietal layer and visceral layer of an internal cavity there is serous fluid that reduces the friction between these two surfaces and allows an easier movement of the parietal and visceral layers. The serous fluid is produced by serous glands that are in the parietal and visceral membrane.
 
        
             
        
        
        
Vitamins are organic compounds that are essential in very small .or shortage of a vitamin may result in a vitamin-deficiency disease. Free radicals are formed not only through metabolic reactions .
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1. triangulation
2. amplitude
3. surface
4. c
5. a
6. d
7. b
8. Seismic waves can be used to determine the structures and materials of the earth because the waves change in their movement and behavior based on the materials or structures that they encounter.
 
        
             
        
        
        
1750mm-2000mm
Explanation:
The average amount of rainfall in swamps and wetlands is 1750mm-2000mm of rain per year. Wetlands refer to areas where water is interrupted by small islands of land and a large number of plants.