Which type of lines are used to emphasize or minimize facial features

This is a type of government in which a group of individual states are united under astrong, central government.

Nstrumental music that supports the main part(s) chamber music 2. a large group of instruments usually including woodwinds, brass, and percussion band 3. music written for small ensembles for an intimate setting accompaniment 4. a person who leads an ensemble conductor 5. an electronic keyboard capable of multiple instrument sounds

Which career worker installs, maintains, and repairs equipment used for communication?