Gospel music creates an uplifting tone because of the 

Gospel Music has a homophonic and polyphonic texture I say this because in Kirk Franklin's song I smile with 158.6m views it portrays a homophonic and polyphonic  texture. Also gospel music always has a positive and uplifting tone with hand claps, pianos and, guitars to maintain that uplifting tone.  Also with the uses of call and response to engage with audience and the crowd makes their songs and performances 10x better.