Answer:
To swim faster
Reducing the drag. As with all the other tips here this one is not about how strong you are as the right technique smoothes out your swimming using your strength in a much more efficient way. 
Work on your kicks. 
Secrets of good propulsion. 
Balance
Slightly spread your fingers.
 
        
             
        
        
        
Answer:
Change in energy
Explanation:
good luck with primavera g.
 
        
             
        
        
        
Food is chewed and mixed by the teeth and tongue before being rolled into boluses by peristalsis and entering the stomach through the cardiac sphincter. In the stomach, gastric juice contains pepsinogen, which is activated to pepsin, which breaks down proteins in beans into shorter peptides. Finally, food is churned and allowed into the duodenum via the pyloric sphincter muscle. Finally, bile Trypsin breaks down proteins into shorter peptides, and pancreatic juice, which is released by the pancreas, contains pancreatic lipase, which breaks down bean oil into fatty acids and glycerol. When food enters the ileum, where succus entericus is secreted, it contains the enzymes maltase, peptidase, and lipase, which break down the remaining lipids (oil) into fatty acids and glycerol, which are then absorbed through the lacteals of the villi. Maltase breaks down maltose into glucose, which is then absorbed.
The Digestion and Absorption Process
Even before you put food in your mouth, digestion starts. Your body notifies your brain that it is time to eat when you feel hungry. Your body's ability to prepare for eating is influenced by sights and odours. Your brain receives a message when you smell food. The mouth is subsequently instructed by the brain to prepare, and you begin to salivate in anticipation of a mouthwatering meal.
To learn more about the digestion and absorption process refer here:
brainly.com/question/13762511
#SPJ4
 
        
             
        
        
        
Answer:
Hey there!
I believe that David's prediction would be: If the amount of pollutants in the atmosphere reached an amount unhealthy for the salamanders, then the salamander population would decrease.
Let me know if this helps :)
 
        
             
        
        
        
Pure water freezes at 32 degrees Fahrenheit, and at 0 degrees Celsius. 
Hope this helps!