Final answer:
Customers consider convenience as an important criteria for selecting a service provider when it comes to gas stations and pharmacies.
Step-by-step explanation:
When it comes to selecting a service provider, customers often consider convenience as an important criterion. In this case, out of the given options, gas stations and pharmacies would be the types of services for which customers would expect convenience to be an important factor in selecting a service provider. Gas stations are chosen for their convenience in terms of location and accessibility, while pharmacies are chosen for their convenience in terms of quick and easy access to medications and healthcare products.