  Bell nonlocality describes a manifestation of quantum mechanics that cannot
be explained by any local hidden variable model. Its origin lies in the nature
of quantum entanglement, although understanding the precise relationship
between nonlocality and entanglement has been a notorious open problem. In this
paper, we resolve this problem by developing a dynamical framework in which
quantum Bell nonlocality emerges as special form of entanglement, and both are
unified as resources under local operations and classical communication (LOCC).
Our framework is built on the notion of quantum processes, which are abstract
quantum channels mapping elements between fixed intervals in space and time.
Entanglement is then identified as a quantum process that cannot be generated
by LOCC while Bell nonlocality is the subset of these processes that have an
instantaneous input-output delay time. LOCC pre-processing is a natural set of
free operations in this theory, thereby enabling all entangled states to
activate some form of Bell nonlocality. In addition, we generalize the CHSH
witnesses from the state domain to the domain of entangled quantum
measurements, and provide a systematic method to quantify the Bell nonlocality
of a bipartite quantum channel.
