Answer:
4 .their degree of ease and versatility
Step-by-step explanation:
The aspect of cakes and cookies that the author is mostly comparing is the ease and versatility at which the cakes are prepared.
The author explained how cookies are generally more versatile than cakes as they are much easier to eat and transport and are not as crumbly
as cakes and also explained how cakes, particularly large ones, tend to be more formal.
These points to the fact that the author was explaining the degree of their ease and versatility.