Make comparison
The ring number 1 is more expensive than the ring number 2./ The ring number 1 is less expensive than the ring number 3.
Make comparison
The boy's bed is less comfortable than the girl's bed.
Possessive pronouns
yours
Make comparison
The ring number 2 is the least expensive.
Possessive pronouns
mine
Possessive pronouns
Her
Why - Because
Because fast food is not good for our health.
Make comparison
The girl's bed is more comfortable than the boy's bed.
Make comparison
The ring number 3 is the most expensive.
Why - Because
Because my finger is bleeding./ Because I cut my finger.
Why - Because
Why is she sad?/ Why are you sad?
Make comparison
This is the biggest apple in the basket.