Step-by-step explanation:
The progressive rock group that combined rock band instruments with strings is Electric Light Orchestra (ELO). ELO was known for their unique fusion of rock and classical music, blending electric guitars, drums, and keyboards with orchestral instruments such as violins, cellos, and violas. This combination gave their music a distinct sound and set them apart from other rock bands of their time.
One example of ELO's incorporation of strings is their hit song "Mr. Blue Sky." The song features a prominent string section that adds depth and richness to the overall sound. The strings not only provide melodic elements but also contribute to the arrangement and orchestration of the music.
By combining rock instruments with strings, ELO created a genre-bending sound that appealed to a wide range of listeners. Their innovative approach to blending different musical styles has influenced many artists and continues to inspire musicians to experiment with different genres and instrumentation.