Each of these begins with the letter B: a. Mountain range where Mt. Rushmore is located. b. Style of art, music, and architecture in the 17th century marked by extravagance and elaborateness.

Mount Rushmore is famously carved into the granite face of a mountain in the Black Hills of South Dakota. This small mountain range gets its name from the Lakota phrase "Paha Sapa," which means "hills that are black." From a distance, the dense covering of ponderosa pine trees gives the slopes a distinctively dark appearance, making the name a fitting description. The region is deeply sacred to the Lakota and other Native American tribes and was the site of a major gold rush in the 1870s.

The term for the ornate and extravagant artistic style is Baroque. Flourishing in Europe from the early 17th to the mid-18th century, the Baroque period is defined by its drama, grandeur, and emotional intensity. Originating in Rome, it was often used by the Catholic Church and absolute monarchies to inspire awe and convey power. In painting, artists like Caravaggio used dramatic contrasts of light and shadow, while in music, composers like Bach and Vivaldi created complex and highly ornamented works. Architecturally, the Palace of Versailles in France is a quintessential example of Baroque's lavish and symmetrical design.