DO i have to give an examples or the definitions about consonance ? uhm consonance is a repetition of consonant letters of course
He struck a streak of bad luck.When Billie looked at the trailer, she smiled and laughed.I dropped the locket in the thick mud.The black sack is in the back.The zoo was amazing, especially the lizards and chimpanzees.

Well as you can see , this was the examples i got while my teacher is teaching 
well as you can see consonants were r epeated , that's why they call it consonance :)