radio - A radio use to communicate and send message like a news but you can only hear voices and sound.
church bell rings - A chruch bell is to signify the time for worshippers to gather for a church service
knocking at the door - Knocking at the door will help us know if someone is in there or not (it's a very common thing to do to know if there's someone inside and to ask permission to come in)
fire truck siren - A fire truck siren it tells them there's an emergency going on somewhere and it helps with traffic. It warns citizens to be alert for volunteers responding to the firehouse and to watch out for fire trucks responding to an incident.
Answers & Comments
Answer:
radio - A radio use to communicate and send message like a news but you can only hear voices and sound.
church bell rings - A chruch bell is to signify the time for worshippers to gather for a church service
knocking at the door - Knocking at the door will help us know if someone is in there or not (it's a very common thing to do to know if there's someone inside and to ask permission to come in)
fire truck siren - A fire truck siren it tells them there's an emergency going on somewhere and it helps with traffic. It warns citizens to be alert for volunteers responding to the firehouse and to watch out for fire trucks responding to an incident.
blowing of horn -
Explanation: