Answer:
A string quartet traditionally includes two violins, a viola, and a cello.
Step-by-step explanation:
A string quartet is a musical ensemble composed of four string players, typically two violinists, a violist, and a cellist. The ensemble is named after the four instruments that make up its core: the first violin, second violin, viola, and cello.
String quartets are a popular chamber music ensemble, known for their versatility, expressive range, and ability to create intricate and sophisticated musical textures.
One of the earliest forms of chamber music was the Baroque trio sonata, which typically featured two violins and a continuo (a bass instrument such as a cello or harpsichord). This form evolved into the string quartet in the mid-18th century, when composers such as Franz Joseph Haydn (1732-1809) began to experiment with four-part writing for string instruments.
Haydn is often credited with establishing the string quartet as a formal genre, and he composed more than 80 string quartets over the course of his career. He was followed by other composers such as W. A. Mozart (1756-1791) and Ludwig van Beethoven (1770-1827), who further developed the form and expanded its expressive possibilities.