Question

why is commerce considered as backbone of industry and other business related activities?

Answer 1

because it solve the hinderance of time, place,people, exchange....

Answer 2

Industry is that part of business, which related to production.
It can be defined as "production of goods and services with a view to earn profits".
It converts raw materials into finished goods with the help of machinery at factories.
Since, production of finished goods are made ready here, business related activities like Trade ( buying and selling) can be performed.
without goods these activities cannot be undertaken.
thus,
commerce considered as backbone of industry and other business related activities