Susan, age 9, has played soccer for years. She used a straight-leg kick every time for a while, but recently she began to try to bend her leg more, depending on the type of kick. As a result, sometimes she makes errors and sometimes she has a superior kick. Just recently she has been able to execute many types of kicks with much greater success. What feature of developmental systems theory does this scenario illustrate?
A. Change simultaneously occurs in several components.
B. The child's motor system is permanently destabilized.
C. The body must wait for environmental factors to kick in.
D. The child's motor system is unstable for a while, but then self-organizes into a new system of action.
Answer: D
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