Answers:
look symbols create a greater impact on people than words for instance if u want a child to understand what is the meaning of an apple u show him the picture n tell that it is of red colour, round shape,then he will understand at glance but otherwise he will take time to grasp things,
next it is useful not only for kids but adults also meaning illetrate,as far as our country is considered its a country where illetrates occupy about 40% population,thus if we want them to understand the traffic signals it wud easily go in their mind if they r showed that red means stop green means go n so on, n imagine if it has to be verbly forget about illetrates even we wud find it difficult to understand it.
they help people understand things in a simple and better way
they help people in developing their skills towards the particular thing using that symbol people understand what type of matter is that and what type of symbol is that and they understand what it means
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