Answer:
60-70%
Explanation:
Carbohydrate is the most important source of energy needed in preparation for prolonged exercise that consumes energy and requires endurance and strength to combat fatigue.  
Carbohydrate is a more efficient fuel than fat as carbohydrates are easily broken down  to supply an athlete with glucose as readily available energy, and also glycogen that is stored in the muscles, which are used as a fuel source during exercise. Hence, for prolonged heavy exercise, it is recommended that athletes need high carbohydrate consumption of 60-70 percent of their calories to maintain optimal performance.
 
        
             
        
        
        
Nuclear energy originates from the splitting of uranium atoms!
a process called FISSION. 
This generates heat to produce steam, which is used by a turbine generator to generate electricity. Because nuclear power plants do not burn fuel, they do not produce greenhouse gas emissions.
        
             
        
        
        
Answer:
I think true. but dont quote me on it.
Explanation: I think true because of the right horn.
 
        
             
        
        
        
The first one with the boxing crab and anemone is mutualism. 
The second one with the dog and flea is parasitism.
        
                    
             
        
        
        
Agriculture negatively affects reef ecosystems because the soil and the sea have a direct interaction of substances and minerals that can be altered with the intensification of agriculture.
<h3>What is agriculture?</h3>
Agriculture is a human activity that is based on planting seeds in the ground so that they develop and form plants that have uses such as food or others.
This is one of the oldest activities of humanity and has allowed communities to develop and create trading systems, wooden constructions, navigation, among others.
<h3>What impact does agriculture have on the reefs?</h3>
Agriculture generally takes place in coastal areas or near rivers because the composition of the soil must have certain minerals necessary for plants to grow.
Additionally, the components of the soil go underground to the sea and provide the water with different substances that contribute to marine life. However, the use of pesticides and other agricultural chemicals could reach the sea through runoff and affect the reefs.
Learn more about reefs in: brainly.com/question/364711