The phrase "are primarily provided" is correct and usable in written English.
It can be used when discussing the main sources or methods through which something is made available or supplied.
Example: "The resources for the project are primarily provided by local organizations that support community development."
Alternatives: "are mainly supplied" or "are chiefly offered".
Tom Blades, the chief executive of Bilfinger which provides engineering and services in the UK and has about 4,000 employees, says: "Because these services are primarily provided locally, a Brexit would have little direct impact".
Its international retail products are primarily provided through third-party financial institutions.
The problem is the ads are primarily provided by wholesalers in real estate, rental apartments, jobs, and cars.
The lateral force resistance and hysteretic energy dissipation capacity of steel plate shear walls (SPSWs) are primarily provided through yielding of the infill steel plates attached to the boundary frame of the system.
The soils are generally productive but water resources are very limited and are primarily provided by snow and glacier melts, which prevent the region from being a productive agriculture (Qi and Kulmatov 2008; Groisman et al. 2009; Sommer and de Pauw 2011; Klein et al. 2012).
Other utilities are primarily provided by private organizations.
Emerging from a strong historic tradition emanating from the United Kingdom (UK), Australian early childhood services have traditionally been divided according to whether they are primarily providing "education" or "care".
"The way this is set up with our very limited role, where we are primarily providing refueling and surveillance for NATO forces.
Hospitals at the secondary and tertiary levels are primarily providing Directly Observed Treatment Short course (DOTS) for the first 2 months.
Prenatal and delivery care is primarily provided by midwives, with a doctor available in case a Caesarean section is needed or other complications arise.
The BBC Trust and S4C on Wednesday published a historic agreement covering a fundamental change in the Welsh language public-service broadcaster's funding, which from 1 April this year will be primarily provided by the licence fee rather than direct government grant.
