In the line "You say the words that help me carry on" in "The Best Is Yet to Come," "on" is sung with a melisma (A E G), giving a sense of that continuation.
In the line "'Cause it's hard, but it's the same for ev'ryone," "ev'ryone" is sung with a melisma, giving a sense of breadth. Initially (at ~0:41 and ~1:44), it's A G A B, but later in the song (at ~2:56), it's E F# E B C# B.
In the line "When ev'rything is wrong, hold on," the three syllables of "ev'rything" are all sung to different pitches (C B A), providing a sense of that breadth.
