Which musical device can composers use to lengthen a note by double

The answer is Fermata

Composers use a fermata () to indicate that musicians should hold or sustain a note longer than its intended value. Exactly how long to stretch the note is not defined, but a note marked with a fermata can even double in length.

according to the report, the government has imposed restrictions on freedom of speech, freedom of the press, freedom of assembly, and freedom of association. the official media remained tightly controlled by government censorship and obstruction. restrictions on the freedom to assemble remain a problem in vietnam.

explanation:

i really really really really really really dont know