Final answer:
The agreement between Darren and Glenda is a non-compete agreement.
Step-by-step explanation:
The agreement between Darren and Glenda is a non-compete agreement. In this case, Darren agrees not to open another interior designing firm in the city of Kelsa for a 25-year period after selling his business to Glenda.
A non-compete agreement is a legally binding contract that restricts an individual from competing with a business in a specified geographical area for a certain period of time.
This type of agreement is common in business sales to protect the buyer's investment and ensure that the seller does not immediately open a competing business that could harm the buyer's new venture.