Answer:
1.Some news bulletins take the form of a
"news crawler" or "ticker," a line of type that
scrolls across the bottom of your TV screen.
A newsflash is different, because it actually
interrupts whatever show you're watching.
2.Weather warnings are important
forecasts because they are used to protect
life and property. ... Since outdoor activities
are severely curtailed by heavy rain, snow
and wind chill,forecasts can be used to plan
activities around these events, and to plan
ahead and survive them.
3. The characteristics
The historical or cultural consideration
critical perspective
4.Movie trailers show us what is
going tohappen on a particular time on a
particular moviewhereas internet-based
programs are programsthat are the
only programs which run only when
theinternet is present.
