Final answer:
A monitor supports synchronization through the use of condition variables, which allow threads to wait for certain conditions before continuing execution.
Step-by-step explanation:
A monitor supports synchronization by the use of condition variables that are contained within the monitor and accessible only within the monitor. Condition variables are a synchronization construct that allows threads to wait for certain conditions to be met before they continue execution. In a monitor, a condition variable has two operations: wait and signal. When a thread calls wait, it is suspended and placed into a queue until some other thread calls signal on the same condition variable, which then wakes one of the waiting threads. Thus, monitors use condition variables to provide mutual exclusion and to manage the execution sequence of threads, ensuring that certain conditions in a program's state are satisfied before execution proceeds.
A monitor supports synchronization by the use of vertical and horizontal sync signals that are contained within the monitor and accessible only within the monitor. These sync signals ensure that the monitor displays images and videos in a coordinated manner, preventing screen tearing and other synchronization issues.