IL (Independent Living) is a charity that provides living aids to help elderly and disabled people live independently in their own home. These aids include walkers, wheelchairs, walking frames, crutches, mobility scooters, bath lifts and bathroom and bedroom accessories. IL markets its products by placing single-sided promotional leaflets in hospitals, doctors’ surgeries and local social welfare departments. This leaflet provides information about IL and gives a direct phone number and a web address. Customers may purchase products by ringing IL directly or by ordering over their website. The information above shows which one of following primary activities of value chain?