What are the answer choices? 
Okay then...
Geothermal power plants take hot water near earths surface and transfer that into energy to heat people’s homes ig i kind of forgot
        
                    
             
        
        
        
Answer:
Combined decrease in sarcomere length.
Explanation:
Sarcomere is the functional unit of the striated muscle tissue. The units get repeated between the two Z lines. The striation under the microscope is shown by the sarcomere.
Actin and myosin protein plays an important role in the muscle contraction. The individual length of the thick (myosin) and thin (actin) filament do not changes and slide over one other. But the sarcomere overall length decreases that result in muscle contraction.
Thus, the answer is combined decrease in sarcomere length.
 
        
             
        
        
        
It is considered to be the placing of similar objects into similar groups. In science, it usually is a part of taxonomy, and taxonomy is science of naming living things by putting them into categories. I hope I helped!