This

Pronome

  is

Auxiliar

  the

Determinador

  main

Adxectivo

  reason

Substantivo

  why

Adverbio

  pesto

Substantivo

  recipes

Substantivo

  often

Adverbio

  differ

Verbo

  from

Adposición

  each other

.

This is the main reason why pesto recipes often differ from each other.

This is the main reason why pesto recipes often differ from each other.