A hazard is a danger or risk.
Example:
The left out chemicals were a hazard, even to the detective who was wearing a mask.
With the advancement of the technology, the modes of communication changed drastically over the years. Earlier, the people waited for days before they can be received emails and messages from their loved ones. But now, with the use of computers, gadgets, laptops, cell phones and other product of technology in a matter of seconds we were able to deliver the information. It becomes easier to people to communicate wth each other in a shorter period of time.
It means the people in the past did something great and we now receive the benefits. he is urging us not to forget, so that we may leave a positive mark in history.
Answer:
This question is kind of confusing.
