list manipulation - Insert at specific resulting positions? (Another option)

I found the answer in this post very interesting to do what I need, but I would like something where I could provide a list to be modified, a list with values that will be added and a list with the positions of the values to be added.

Something to get this result:

listaInicial = {0, 1, 2, 3, 4, 5, 6, 7};
listaModificadora = {a, b, c, d, e};
listaPosições = {2, 6, 7, 8, 13};

Fold[Insert[#, #2[[1]], #2[[2]]] &, listaInicial, {{a, 2}, {b, 6}, {c,
    7}, {d, 8}, {e, 13}}]

{0,a,1,2,3,b,c,d,4,5,6,7,e}

P.S:I think it should be very obvious, but I am still suffering with Slot function. One day I will be able to understand this function with a lot of training.

Answer

You can start applying Transpose function:

listaInicial = {0, 1, 2, 3, 4, 5, 6, 7};

listaModificadora = {a, b, c, d, e};
listaPosições = {2, 6, 7, 8, 13};
Fold[Insert[#, #2[[1]], #2[[2]]] &, listaInicial, 
 Transpose[{listaModificadora, listaPosições}]]

{0,a,1,2,3,b,c,d,4,5,6,7,e}

Or

InsertValuePosition[list_, values_, positions_] := 

 Fold[Insert[#, #2[[1]], #2[[2]]] &, list, 
  Transpose[{values, positions}]]

InsertValuePosition[listaInicial,listaModificadora,listaPosições]

{0,a,1,2,3,b,c,d,4,5,6,7,e}