please answer urgently....
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explain the concept of business risk & its causes...

The concept of business risk and its causes are already given in our revision notes of Business Studies XI. Follow the given link and scroll down to the topic 'Business Risks'

https://www.meritnation.com/cbse/class11-commerce/revision-notes/business-studies/business-studies/nature-and-purpose-of-business/1161_5364