The business description is basically describing what the business is for like what is the purpose of the business or what the business is doing.
Marketing strategies is basically the methods used by a business to promote their products such as public relations advertisement etc.
The marketing plan is basically a strategy that is set by the business to attract customers.
Operations and management plan is basically listing the organizational structure in the business and the activity those individuals will carry out.
The financial plan of a business is basically a financial strategy to determine how much money/monetary capital is required for the daily operations of the business.