Thus a stack-based runtime environment is inadequate, and a more general form of environment is required, called Fully dynamic Environment In fully dynamic environment, the basic structure of activation record remains the same The space must be allocated for parameters and local variables. and there is still a need for control and access link When control is returned to the caller the exited activation record remains in memory, to be de-allocated at some later time• Thus, a stack-based runtime environment is inadequate, and a more general form of environment is required, called Fully Dynamic Environment • In fully dynamic environment, the basic structure of activation record remains the same: – The space must be allocated for parameters and local variables, and there is still a need for control and access links • When control is returned to the caller, the exited activation record remains in memory, to be de-allocated at some later time