The correct answer is : collaboration
In some cases, a company may not have enough resources in order to complete a project
For example, X-Law firm just received a huge case to handle a nation-wide fraud. But there's only one problem, the X-law firm do not have enough employees to finish all the paper work in time. In this case, X-law firm may collaborate with another law firm ( let's just say z-law firm), so z-law firm could loan out some of their qualified employees in exchange of small percentage of profit
