Answer: A) Inertia
Explanation:
Consumer inertia is defined as the tendency of consumer to buy the product from the particular shop or firm even if shop doesn't have up-to-the-mark service, product quality , quantity of good, etc or if there are better services in the market.In this situation consumer keeps following the same service.
According to the situation in question, Richard does not like the grocery store but still shops from there due to location convenience.So he does not change his grocery shopping spot even if he has better options.
Other options are incorrect because customer equity is part of customer relationship management. Customer entropy is different levels of disorder in market field for consumer. Consumer intensity is the potential of customer regarding market. Conformation regards with customer satisfaction of service and goods.
Thus, the correct option is option(A).