Answer:
d. None of the above
Explanation:
Fitness -
Fitness is to carry out day to day tasks with alertness and vigor , without any of fatigue , along with the energy , to respond to emergencies and to enjoy leisure-time pursuits.
Advantages of Fitness -
- avoid diseases by fitness .
- muscle strength increases .
- stabilizes the balance of the life .
- increases the body alertness and speed .
 
        
             
        
        
        
1. natural selection acts on existing traits because you can not evolve into something you didn't have 
2. original structures evolve to accomplish new function in order to survive
 
        
             
        
        
        
Answer:
Oh wow thats cool...... you can just look it up on the internet. There are the most amazing tricks and things on there.
 
        
             
        
        
        
C. They are specialized tissues that form an organ system.  
hope it helps!