The phrase "are the main elements" is correct and usable in written English.
It can be used when discussing the key components or features of a particular subject or topic.
Example: "In this analysis, we will identify what are the main elements of effective communication."
Alternatives: "constitute the key components" or "represent the primary factors".
What are the main elements of this minstrel voice?
Yes, the plot, the characters and the realism are the main elements of the show, but the comedy is the glue that holds them together.
Fuel rationing is still in effect, and a grim weariness hangs in the air, as palpable as the dust and damp that are the main elements of the atmosphere.
Halfway through his speech, Mr. Rahimi said there was a difference between Jews who "honestly follow the prophet Moses" and the Zionists, who are "the main elements of the international drugs trade".
Actuators are the main elements for their control design.
Following are the main elements of interest in a train station.
Human resource expenses are the main element of investment which should be used in calculating an entity's return on investment.
Stimulating local production to cater to an increasing share of domestic consumption and imposing diverse restrictions on imports were the main elements of the import substitution policy.
In addition, temporal masking, asymmetric noise suppression (ANS), and power law non-linearity with a 1/15 exponent and GFB were the main elements in the PNCC construction.
Energy dispersive X-ray showedometry showed calcium and sulfur to be the main elements, while quartz, gypsum, ettringite and nacrite were the main crystalline compounds found in this formulation.
Knowles further explained that the fashion and choreography were the main elements of the music video: The fashion was extremely important in this video because everything was so minimal.
