Answer
The economic power of the medieval church was increased by;
• The collection of tithes
Step-by-step explanation
The medieval church was able to gain economic growth through the collection of tithes from every Christian, peasant and lords. The amount was one tenth of income obtained. The tithes were paid in form of money, or goods where as peasants provided the church using seeds, crops yields and animals. People struggled to pay their tithes though they believed that failure to pay would result to their going to hell.