a. classical conditioning. 
 
hope this answer correct (^^)
 
        
             
        
        
        
Troponin binds to Ca2+ from the sarcoplasmic reticulum. The propagation of an action potential along a skeletal muscle fiber causes the release of Ca2+.
What is a cross-bridge cycle?
As seen by the cross-bridge cycling, the action of the contractile proteins shortens muscles. The cross-bridge muscular contraction cycle can be seen in many types of muscles, including cardiac, smooth, and skeletal muscles. Therefore, when riding across bridges, all muscle groups contract.
What transpires in skeletal muscle during a cross bridge cycle?
The Pi dissociates after the myosin creates a cross-bridge with actin, causing the myosin to proceed through the power stroke and shorten the sarcomere, which lowers its energy state. In order to dismantle the cross-bridge
To know more about cross bridge cycle visit:
brainly.com/question/7031861
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<u>Answer:</u> The decisions to ban and then reinstate eligibility in the Oscar Pistorius case raises questions about the "process through which deviance is defined in sports".
<u>Explanation:</u>
South African athlete Oscar Pistorius was on court charged with the murder of his 29-year-old model and law graduate girlfriend named Reeva Steenkamp at his home in Pretoria on 14 February 2013.
Pistorius is a leading South African runner and gained recognition as a high-level athlete with a disability, including several Paralympic Games and the 2012 Summer Olympics. 
The judgment given by the Judge named Thokozile Masipa that Pistorius was not guilty of murder but guilty of Steenkamp's culpable homicide (unlawful killing of a person with or without intent to kill, depending on how the crime has been defined by a particular jurisdiction).
Soon after Pistorius was banned by sports authority, his arrest and later imprisonment was big shock among media and people. But later his eligibility was reinstated which raised questions about the "process through which deviance is defined in sports" and opposed by many people.
 
        
             
        
        
        
Your answer is D, hope this helps
        
                    
             
        
        
        
Earthworks "merge with their environment".<span>
'Site works' portrays the work required on your building site to set it up for your home to be worked, and also the continuous administration of the building site. 
The earth works refers to the second part of site works which is the work that should be done on the building site to guarantee that your home can be constructed appropriately, that it's worked in the perfect place, and that it will be steady and secure.</span>