Explanation:
Primary market for securities is one that provides access to buy new new issues of stocks and bonds of a company. A good example of primary market is an Initial Public Offering (IPO), organized by a company that wants to sell it's shares for the first time to investors.
While Secondary market, are places to sell securities to a secondary (second) buyer from the current security owner who bought from the primary market.
The primary market is dependent on the secondary market since it is the demand from the secondary market that determines the asset valuation of the primary market.