Final answer:
Humans can best understand time by recording the beginning, ending, and duration of events. Therefore, the correct option is 4.
Step-by-step explanation:
The best way for humans to understand time is through recording the beginning, ending, and duration of events. This method allows us to track the passage of time and organize our schedules. By keeping a record of the start and end times of events, we can create a sense of order and manage our daily lives effectively.