Hello there,
The answer to your question is <span>Isometric contraction
Hope this helps ^_^
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The theory of evolution would be the correct answer. 
I hoped this helped!
        
             
        
        
        
<span>Suffocation is a most leading reason of death in grain storage
bins. Grain handling industry is a high hazard industry where workers can be
exposed to numerous serious and life threatening hazards. These hazards
include: fires and explosions from grain dust accumulation, suffocation from
engulfment and entrapment in grain bins, falls from heights and crushing
injuries and amputations from grain handling equipment.  </span>
 
        
             
        
        
        
Answer:
1. Support 
2. Protection
3. Movement
4. Supply & Storage
Explanation:
1. Support :  It provides a framework to support the organs and tissues of the body.  
2. Protection:  It protects our internal organs.  The skull protects the brain; the thorax (sternum, ribs and spine) protects the heart, lungs and other viscera (organs within the thorax).
3. Movement:  It provides a framework for muscles to attach.  Then when the muscles contract they pull on the bones of the skeleton, which act like levers to create movement. 
4. Supply & Storage:  The bones that make up the skeleton are a source of both red blood cells (which transport oxygen) and white blood cells (which fight infection), which are formed within the bone marrow.