music: Song title: "Nothing lasts forever but the earth and sky."?

Questions

(It., 'texture') - The natural compass of a singer's voice, or simply the compass of a vocal or instrumental part in a composition.?

- A melodic group of notes forming the basis or chief idea in a composition by repetition or development. In musical analysis it is equated with subject. The term theme and variations describes a long musical statement which is developed.?

- Same as continuo.?

- In musical notation this is a line joining two adjacent notes of the same pitch together, indicating that the first note only should be played but should be prolonged until the second note's time value is up.?

- This describes the basic rhythmical patterns in music (e.g. 6 / 8 time or 4 / 4 time). Also march time, waltz time, etc.?