text: **How Lambda invokes your function (runtime environment)**
  
  Lambda invokes your function in an*execution environment*, which contains a secure and isolated 
  
  *runtime environment*. 
  
  • A*runtime*provides a language-speciﬁc environment which relays invocation events, context 
  
  information, and responses between the Lambda and your functions. 
  
  • An*execution environment*manages the processes and resources that are required to run the 
  
  function. 