It's basically requesting for details of your financial assets, savings and liabilities i.e. credit card debt, mortgages, etc.
11A - all your savings and current account numbers and the current amount you have in them and any fixed deposit accounts you have.
11B - any property you have or inherited
11C - stocks and any other personal investments like bonds, etc
11D - do you have a business that's related to the stream you're applying under? If so, provide these details as well.
11E - pensions and any other assets you have that don't fall under A - D
11F & G - liabilities (debt) - CC, loans, etc
If any section doesn't apply to you, just put NA. Don't forget to include 11J, which is an explanation for how you accumulated all the money/assets in 11A - E. Hope this helps.
You may also find this link useful -
https://www.canada.ca/en/immigration-refugees-citizenship/services/application/application-forms-guides/guide-4500-applying-permanent-residence-business-class-applicants-self-employed.html#4000E5