2) y cheese, cheese, butter; , cottage

Solution:

The task is to complete the list of words. The given words are 'y', 'cheese', 'cheese', 'butter', and 'cottage'. The missing word starts with 'y' and should logically follow the pattern. Considering the context of food items, 'yogurt' is a plausible word that starts with 'y' and fits the category.

1. yogurt, cheese, cheese, butter; , cottage

Answer: yogurt